Sort:  

You setup an account at coinbase and when you make a purchase, you select... ETH or Bitcoin. Simple as that. You can even setup a set amount to invest, daily or weekly.
www.coinbase.com

Coin Marketplace

STEEM 0.20
TRX 0.14
JST 0.030
BTC 67975.29
ETH 3240.67
USDT 1.00
SBD 2.66