Nothing needs to be feared in crypto, because everything we do must have risks. Because the possibility that happens a little if we save coins in the wallet online and at one time the site will disappear, actually I am not afraid because there is no way that could happen.
if you had a huge sum of coin on the site you will know that you have to be scared, the possibility of it happening in an account you control the private Key is very slim, only if you expose your private key to someone else, so someone gat to be scared if he has huge amount there