I'm currently using 2. I have majority of eth in my MEW and my BTC's and other alts are on my hardware wallet from Ecomi. They're partnered with Coolbit which  supports 2fa and you need to push the button on the actual thin card before you can make a transaction. For me, security is everything and I don't want my funds to be possibly stolen at all. It also has the option to trade in your coin to other coins which is so cool.