I definitely agree that fraud mitigation is the key factor in a business like this succeeding or failing. Instant access to coins is certainly something that ca

I definitely agree that fraud mitigation is the key factor in a business like this succeeding or failing. Instant access to coins is certainly something that can attract the wrong type. There are certainly pros and cons to self-custody - it's not for everybody. Given the value proposition of Bitcoin and the huge amounts of cryptocurrency stolen from exchanges, it's important for many people to hold their own keys. We're like that ourselves: we didn't want to choose between holding our keys and still being able to trade, which is part of why we built Sparkswap.