I would completely agree with but i would also like to add more to it :

Firstly don't trade if you don't know how to or can no longer understand the market. What i mean by this is i used to trade last year but because of the sudden increase and major fluctuations i decided to quit trading daily instead i started purchasing coin and holding it , till now I'm able to triple my portfolio with this method.

Another important thing to do is stop trusting exchanges amd having control over your funds , the reason is because of the numerous exchanges getting hacked like the recent xem hack. Get a ledger or a trezor , if not buy a separate laptop , download only wallets in it , store your funds and keep it turned off unless required.