Use more exchanges, if you spread your trades amongst several exchanges if/when one of those fails at least it won't take all your money with it.
How legit is Tether? Any thoughts on that? I could exchange the USD to Tether and store it inside Tether, and then when I need the USD, send the Tether to bitfinex and then buy the CC of my needs and participate in trades.. But don't know much about Tether, and it could go down aswell..
I want to use Tether too, but I find that it has a rather strict verification process. No biggie, in fact, I am on my way to submit the required documents/IDs. I don't know how solid Tether is, afaik it has a page about how much USDT is in circulations and stuff like that:
https://wallet.tether.to/transparency. Other options are
nubits and BitUSD.