New websites found recently:

• https://www.viabtc.com/tools/broadcast
• https://pushtx.btc.com/
• https://cryptocurrency360.com/bitcoin-accelerator/
• https://bitaccelerate.com/
• https://btcaccelerators.com/
• https://btc.network/broadcast
• https://blockchair.com/broadcast
• https://btcnitro.com/
• https://blockstream.info/tx/push
• https://bitaps.com/broadcast

Some require the TX (acceleration services) whilst others require the RAW transaction.

The same thing is happening in my country, currently many exchange sites such as binance, huobi, kucoin, and so on are officially blocked, but I can still use the android application, of course it is difficult to leave fiat and focus on bitcoin because when we hold bitcoin then cannot be used for direct transactions as in fiat.

Hello Bitcoiners

I will post here list of all BTC Accelerators, if i missed any please post it on reply.

What is Bitcoin Accelerator ?
Transactions with too low fee can take hours or even days to confirm, and sometimes never confirm at all.
But there are PAID and Free bitcoin transaction acceleration services available now which you can use to prevent your own transaction from getting stuck.

Free Accelerators :
ViaBTC
https://pool.viabtc.com/tools/txaccelerator/
It gives 100 transactions per hour, this will mostly be expired within first 5 minutes of each new hour. but if you had a chance to get your transaction submitted, it will has high chance to get it confirmed shortly.
1ink
http://1ink.cc/?view=transaction-accelerator
This tool was developed by 1ink.cc team for his users to confirm stuck payouts and deposits, but anyone else can use it. this will submit your transaction into 5 common accelerators at once, it could give fast results when many of included accelerators approve your transaction.
Confirmtx
http://confirmtx.com/
This is one of best free accelerators if your transactions has little inputs/ outputs. because it works only on small sized transactions.
Antpool
https://www.antpool.com/user/prioritiseTransaction.htm?m=savePrioritiseTx
Requires for users so sign up. They prioritize transactions based on fees (not suitable for users that use very low fees since they have to wait for a long time, prior for their transactions to be included in a block that they manage to mine).
Bitcointalk Helpers
There are good people ready to help you by confirming your transaction as possible.
All you have to do is posting your transaction ID on their topics.
here is list of topics which are approving transactions to confirm :
https://bitcointalk.org/index.php?topic=1943939
https://bitcointalk.org/index.php?topic=2634663

Paid Accelerators :
BTC.com
https://pushtx.btc.com/
One of best paid accelerators ever, you will get your transaction confirmed within next block, usually it takes less than 15 minutes to get it confirmed, this could be costly for many, but for urgent /high-amount transactions this service is best choice if you agree to pay more for your transaction confirmation.
ViaBTC
https://pool.viabtc.com/tools/txaccelerator/
ViaBTC also provide paid accelerator service for special cases such as urgency, extremely low transaction fee etc.
According to transaction size, a donation of 0.01 BTC or BCH per KB is required for each transaction. contact ViaBTC (support@viabtc.com) for details about paid accelerator.

If there is any missed Accelerators please post it as reply, i will add it into my list.

Best of luck!

Please confirm transaction
tx dc5e9b281b59c20af85b194dee0a6ccd56cf11f0dcd9b3c338c3e7312b748fc6

This is something useful. This may indeed mean that your friend's money may not be stolen, although it again doesn't add up, since if he would have sent smaller amount, the transaction would have been looking different.
That transaction looks like either a consolidation of funds, or seep (as nc50lc said!), either a hack. And in the previous or next few days there were no transactions from that address.

It's quite sad that you are asking here this late; back those days your friend could have been more certain about what he did, hence be more helpful for tracking the funds.


However, if it's not a hack (I'm not 100% convinced, but let's get more optimistic, at least.) then it's a consolidation or sweep.

Although I didn't follow those, I remember some stories (I don't know how real) about sweeping a paper wallet that ended into disaster, funds being sent to odd/unknown addresses.
Again, I don't know those well, but maybe it rings a bell to somebody familiar with the topic.

First I'd try to see though what other addresses are in that wallet, since there are more transactions going to 1EF3DDBaPzbpJ5cXHVW2gZkyG1Jd4FotFW and they look intended, while the change goes back to 13uzBESjqTT87ak4uAipKUoP8EuVHcQk2e.

It doesn't look like a change address at all because it's the only output of that "49.5BTC" transaction.
It's more like a consolidation or sweep transaction.

There's a possibility that he swept it (sweep) instead of "import" because the transaction had sent all of the address' available coins at that time to that address.
If that's the case, it should be in the wallet where he used "Sweep".
One scenario that it might happen is: when he's trying to import it to another wallet like Electrum, but since import is disabled for a standard wallet, he used sweep instead which sent all of his balance to one of that wallet's address.

Wherever it is now, it looks like it's not in his paper wallet nor Mycelium anymore because he said he didn't recognize the address and he can't find the balance in Mycelium.
With that, try to remember any other wallets that he might have used specially those with "sweep" function, then look for any related backup.

If he didn't initiate any send action there, I don't see how it could be a glitch in Mycelium.
Unfortunately, from what I read, my conclusion is that somebody else got access to the private key of 13uzBESjqTT87ak4uAipKUoP8EuVHcQk2e and stole the coins by sending them to 1EF3DDBaPzbpJ5cXHVW2gZkyG1Jd4FotFW.

On the other hand, I see multiple send actions from 13uzBESjqTT87ak4uAipKUoP8EuVHcQk2e to 1EF3DDBaPzbpJ5cXHVW2gZkyG1Jd4FotFW, even with change back to 13uzBESjqTT87ak4uAipKUoP8EuVHcQk2e, hence I think that something is missing from the story.