As someone who follows cryptocurrencies from a distance, I like to put relatively small amounts, say $100, into Coinbase, then use that to do regular small purchases (leaving only $100 in Coinbase). I've been using it to make domain renewal purchases on sites like Gandi.net. As far as I know, in my circles, that's what most people do (anecdotal, I know).

Although seeing the impact of Alphabay (market) adopting ETH, there seems to be a huge market for cryptocurrencies and it probably won't go away until governments start legalizing/regulating harder drugs.