Hi TryNinja, thanks for your feedback. I don't change it for USTD because the conversion rate isn't good. For example: the price of BTC on coinmarket is 2.5k USD and on Poloniex USTD you have to sell it on 2.4K or less.
I will take a look to Bitfinex. How about Kraken?

I find it very difficult to cover myself. For example: the limit to take out on Poloniex is 25K (but in BTC) and in coinbase they only allow to change 9K. I hold much more than that and every time I see a crash coming cannot do anything about that and see my portfolio going down 25% which is a lot.

How people is doing to cover themselves? (of course I'm talking about people who have a portfolio over 200K, it is easy to get out below 10K).

Thanks in advance.
Evariste