This looks like you purchased a Stripe account which the scammer never mentioned in any the service thread. And you could have cut your loss by not sending the second payment and using an escrow in the first place. Sorry for your loss.
Nothing can be done at this moment than to tag the scammers profile.

Most likely is a scam.
I am sure he going to ask you to register for an account on a platform and send you the BTC, thinking you'd send on-chain ETH to his/her wallet address.
It's better to avoid a transaction like this with OP judging by the post history the account.

As much as I love the concept of your website, I am more concerned about the past and current performance of PLT token as shown on Coinmarketcap and it isn't really impressive and it would scare someone like me to want to purchase a token with low daily transaction volume and little liquidity. Just imagine a big win and I am unable to trade my tokens because there is no liquidity.
And also, the tokenomics are confusing as well. Currently, the top two holders are holding around 70% of the supply which is huge. According to the whitepaper, 35% is meant for Allocation for lottery pools will be distributed for 2 years for promotion and adoption, but i see nothing like that here. Wallet address 0x2179ef18000938434ffd6608631961d164def3b4 is holding 37.6408% and has been the one making outgoing transactions which I believe could be the wallet that's handling the promotion and adoption but isn't the 35% like the whitepaper said. The second wallet holding 33.7218% doesn't have outgoing transaction and the last incoming transaction on the wallet an amount 5.4 million tokens. Do you mind explaining what the wallet is meant for and why the tokenomics doesn't actually match well?
Welcome to the forum btw. Hoping to read your response.

This right here!
You had genuine intentions for him when you were guys were young but he had the opposite. I wonder why he lost his job in the first place. And there is also a lot more than the story he might have cooked up for you.
It very risky to associate money with such person.

Nothing to feel bad about here. I understand it's family but one must think first about risks when it comes to lending no matter the story they cook up. And good thing you know your cousin well and was able to take a good decision and not the other way, which could have led to lose of that money.
Communicate with him and do like nothing happened.

I already knew it was going to end bad, reading the first few posts and the negative tags on OP profile.
It is a really big mistake to lend someone, especially a newbie a non collateral.
Lender should have been patient and maybe someone would have made a caution.
Lesson learnt here today.

This is not only beginners problem, expert traders also get liquidated.
One can lose money in both futures and spot trading. Only tools needs is discipline to an higher extent and not allowing greed take over ones mind.

This is how most scammers are able to scam their victim. Trying to capture their victim mind without them having to say no or think twice.
This is currently being used by scammers in NFT space. They always claim to have received millions of funding from big VCs but they end up setting a high mint price, or they give or short mint window so as to create FOMO.
Proper research and investigation will help a lot if you sense this kind of tactic.

Crypto exchanges can seize users fund for reason like
receiving stolen funds
discrepancies in details submitted during account registration or insufficient info during AML process.
use of unsupported tools in ones account.
there are lot to mention And these exchanges will never give you reasons because of confidential reasons.

Top 5? Yes.
With the current hype? No.
They need to come up with something apart from being just a meme coin. Look at supply for example, it's too much and would take time for it's mcap to go up.
Invest and take your profit just like everyone else.

But they can't beat the coins you mentioned in terms of mcap and use cases. This meme coins are just trends which dies sooner or later. It's better to invest wisely in them and divert their profits into big mcap coins.

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" 31,666,666$
Assuming mark invested in bitcoin at the time instead of buying WhatsApp.  Currently he would have become one of the highest holder of bitcoin or probably  the richest man alive at the moment  thereby leaving a very thin line for anyone to surpass his wealth, investing  in bitcoin would have been a wiser choice though.

Why bitcoin?
        How the fiat world works is different from how the crypto world works.Elon understands what he's doing well, reason why he invested in bitcoin and it gave him good return in short term, he has influence in the market.

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It's uses Binance Chain and also listed on BinanceDex and otherexchanges including gate.io. Same Binance also own Trustwallet. As OP said, you need to withdraw it from Binance before January 5, 2021.
TWT has been performing really well and I think it will do more, next year. A lot of TWT was airdropped and price didn't really crashed.