can I buy stratis on bittrex exchange? I have all my btc there! Is it safe to withdraw?
Sure you can. Yes it's safer to keep STRAT in your wallet, preferably ledger nano S, than leaving them on any exchange.
Yeah, if you have any significant amount of STRAT, please don't leave that on exchanges. Transfer to your personal wallets. Also, if you have a bunch, you can get PoS rewards which exchanges don't give you.