You are right. The main vulnerability beyond the downstream security issues of crypto is market manipulation. But that comes with the territory when trading in any type of currency. I believe the key is to diversify money and wealth into different baskets - some here and some there. That way if one is hit in some way, all is not lost. Putting all of one's eggs into a single basket has never been a smart move regardless of the medium of exchange used. This should not be a battle between what is better - this or that. They all come with good points, and all have some weakness. Balance is the key in trying to spread out risk.