After MtGox, I think Bitcoin took a knock because people realised it could vanish unlike government-backed currencies which have some security. It has taken off in areas with high inflation or other unstable currencies though. I'd treat it more an an investment than a currency. My problem has always been figuring out how it works. It looks like the wallets are secure, right up until you spend anything and then your private key is out there in the block chain publicly for anyone who wants to debit your account.