Coinbase? ... are you asking for my personal appraisal, or for my unbiased one? My unbiased one is that their business model may not hold up long term, but they're fine at the moment. Continuing to grow pretty quickly.As for security of funds in their accounts? They're... so-so. I wouldn't want to have money there if I knew someone who truly knows what they're doing was targeting them. Short of that, they're fine. I can't speak to their services, as I'm not a customer of theirs.