I'm still learning about all this stuff but Coinbase has screwed me over twice now, with its purchase limits and also with the site being down. I attempted to buy ethereum for the first time when it's was at $90 about a month and a half ago but coinbases limited me to spending $150 per week.... what a Joke, I had $1000 to put towards it and only ended up with 4 ethereum by the end of it.