How fortunate you are ! I wish there is someone who also send me a big amount of btc . Anyway, on the side of not placing even some of your coins to a bank (converting it first of course) hmm I don't say that it was a bad idea and I'm not saying it is a very good one. For me it was on neutral because what you did may lead you to earn profit faster but all of your money remain at risky situation. Just be wise on money management.
Don't yet invest to altcoin because it's a little bit more complicated than btc. You'r new in here so much better if you play safe at least for now. Continue holding while learning more about crypto . Good luck.