Definitely false. If you're using bitcoin and want to be uber-safe, then you should wait for six 10-minute confirmations. That's an extreme example though. In p

Definitely false. If you're using bitcoin and want to be uber-safe, then you should wait for six 10-minute confirmations. That's an extreme example though. In practice you can spend right after the first confirmation, which can be seconds to minutes for other cryptocurrencies.