You just don't expose your own private key in public and then it might be safe... for a while..

The best way to learn about it is bitcoinwiki.org Tonns of info there.

They are just lost foreveer. I've read that nearly 4 million bitcoins have been lost forever. Just as gold bars are lost at sea or $100 bills can burn, bitcoins can disappear from the Internet forever. When all 21 million bitcoins are mined by the year 2040, the actual amount available to trade or spend will be significantly lower.

Unconfirmed transaction means that the transaction has not been included in a block and thus has not been completed. Most recipients require at least one confirmation to complete the transaction, including Wirex.

Common reasons for unconfirmed transactions are:

You have just made the transfer. The Bitcoin network needs at least 10 minutes, on average, to include the transaction in a block;
The blockchain fee is too low or absent. The lower the blockchain fee, the lower you transaction's priority in the Bitcoin network. Therefore, the longer the confirmation will take;
The Bitcoin network is overloaded. Due to its limited capacity, the network simply cannot process transactions fast enough, especially during high transaction periods.
If your transaction is unconfirmed, usually you just need to wait. Most transactions get completed within a day or two (or more if the blockchain is overloaded).

I also use freewallet and I'm very satisfied with it

I would invest 50% in BTC if I were you. And other half to altcoins - ETH, LTC and RIpple

Yes, it's definitely considered a wallet. But not a very safe one. Cryptocurency Exchange also have security measures but is not advisable to store a large amount of Crytocurrencies. Hackers are tirelessly working to steal BTC's in an Exchange. Convenience is one of the common reasons why people are always storing their money in an Exchange. Also in real life, most people are not storing their money in bank because it also has the possibilities to be robbed, more likely in an exchange which is Digital

There's a very good resource - bitcoinwiki, where they have lot's of brilliant articles about crypto. Here's the link for you

It's quite safe, but it has been hacked several times through it's history. And still there're public records aabout all transactions, so it can be tracked, if not now than in future

Well, Perfect Money is considered to be ok good, also I've recently found FreeWallet. It is very convenient to use, rather fast and nothing have ever been stuck there, the longest transaction I had was 3.5 hours, but normal for ICO crypto, which I put out into BTC, most likely. And in freewallet you can sent BTC without commissions, although usually it is around $15, so this is a very nice bonus.

If you're using a mobile app cryptowallet, you can interact through it wuth any coin it support. But it's supposed to be unsafe, better use cold wallet to store your assets

I strongly recommend you to study first before starting trading. You can check bitcoinwiki.org for that. You can find all the answers there

I use freewallet and myetherwallet. this combination works perfectly for me

проблема в том, что они тут очень следят за мультиаккаунтом и могут даже просто при постинге на форуме это прочекать и забанить. и дальше труба. потеряете наработанный аккаунт, будет крайне обидно, ни за что по сути.

очень много уже про это говорено. оцениваешь команду, оцениваешь адвайзоров, смотришь, что еще эти люди делали и какой был результат. да и сам проект надо оценить. есть всякие сайты, которые выдают рейтинги ИСО, это косвенная, но все-таки инфа

Главная разница - цена и стабильность.
Но вообще уже столько раз на форуме это обсуждалась, да и в принципе такие базовые вещи уже давно расписаны на специальных ресурсах типа bitcoinwiki

Вьетнам посмотрел на Китай и побежал в ту же сторону. Это все звенья одной цепи. к концу года весь блокчейн будет зарегулирован донельзя.

Это на самом деле очень серьезная опасность, так как на территории китая огромный процент всего мирового майнинга сосредоточен. И если им лавочку прикроют, боюсь даже себе представить, что начнется. И так уже сейчас более 100к неподтвержденных транзакций по битку висит.. очень это все опасно..

Я изначально все на bitcoinwiki смотрел. Но вообще, конечно, лучше англоязычные читать ресурсы, по каждому конкретному вопросу делать серьезный desk-research. потому что даже на хорошем ресурсе тема может быть подана однобоко или не учитывать каких-то особенностей.

I like Binance as they provide 0.1% fee. And they are continuously working to improve. I used to respect hitbtc but after I lost $100 there I became a hater. Now I keep binance acc, coinbase acc and recently got a freewallet acc cause they are really working hard to keep low fees and do btc transactions quite fast and cheep