Who has the 3btc limit, bittrex? Also, does the 3btc limit apply only to fiat conversion or to anything off the exchange? If someone wanted to simply move btc which they had converted from Decred off the exchange into a desktop wallet or Trezor, is there a limit on that? Thank you for all the help. My replies might be sparse in the next few days btw as I'm taking my computer to have a new screen installed and everything wiped clean.
trex has 3btc if u are tier 2 verified (phone, name etc.) and it applies for crypto-crypto, If you want crypto-usd you have to go for full verification means u have to provide id,photo and crap like that.
I definitely not recomend to do full verification on all exchanges you are going to use. Pick one or two to which you trust and there make full verification to be able to do withdrawals properly.
For rest it's enough to have name/phone and you are good to go with some small limitations.
finex have no limit on crypto after tier2 verification - which is ok, they have no USD conversion atm (I think), but it does not matter much, you can always transfer your funds to stamp for example and withdraw from there to fiat.
Or u can manage debitcard to go directly from crypto to fiat in stores (tenx,monaco)
there is so many options
trezor is definitely one of the best choises how to protect your assets, good move.