Hi guys! I am about to put 5000$ in 4 major currency: ETH, NEO, XRP and 10 or 15% in BTC. I plan to use also a hardware wallet(ledger) to store all the coins. My plan is to buy BTC transfer it to Bittrex, exchange it to ETH,NEO,XRP and then send it to my personal wallet. Any tips regarding the transfer/wallet/ platform choice for buying BTC ? (I don't need any investment advice) ? Cheers!