I was the owner of the original, original Bitcoin7 exchange. Before it was hacked, even back then I was using cold wallets to store all of user funds. Fortunately I was able to return everyone's currency with no issues, which would is worth billions today. We peaked around 60,000 - 77,000 users in 2009 running on basic APACHE. Dare I say it, I made a lot of people very rich, especially if they've HODL'ed. After my exchange was hacked I was discouraged to continue and went back to developing websites and applications, so I sold the exchange. What they did with it after, I could care less.