Hey man, i (partially) feel your pain. I started trading in May, just after the first alt-coin jump was on us. I lost about 60% of all my coins, now i'm at around +60%.
Trading crypto has the same 'rules' as regular trading. What i took away from it was:
- Always have a plan and stick to it: Before you step into a trade, decide what your plan is and try sticking to it. - Leave your emotions at home: You shouldn't trade money you can't afford to lose. I'm sure someone else said that before, but i can't stress it enough. To me, even losing that money sometimes feels like shit, i have no idea how that would feel with money you CAN'T afford to lose. - Try sensible, baby steps. Be glad with 10% returns instead of 200% gains. - Don't put all your money on one horse, but diversify. That way losses on one coin aren't pulling the whole of your portfolio down - Read up on all of this. A good book that was handed to me: Trading for a living by Alexander Elder - Don't always sell when your coins are going down. Unless it really is a shitcoin, things will probably look up in the future. Just stay away from stepping onto a FOMO train at the wrong time. You (almost) NEVER want to buy a coin at it's ATH (all time high). You never know when it will get back at those levels again.
Don't despair. There has been plenty of opportunity in the past, but there is a lot of opportunity in the future still.