Is it safe to keep your all crypto currency at a single exchange (bitfinnix)?Or one should choose multiple exchanges.
A single or a multiple one still not make a difference at all. I hope you are active in the crypto scene because hacking is very usual to happen in exchanges. So if you just place them in exchanges, you put them where there is a huge percentage they could be stolen. Creating an offline wallet or buying a hardware wallet is the answer.
Yes the funds should be in a wallet if it needs to be secured because most of the exchanges were hacked recently.OP needs to understand that exchanges is only for converting our crypto then it should be moved to a wallet where we can control our crypto currencies.Keep your coins in exchange only if you have the intention to trade it nearby.