Also your investment option makes no sense. Logic dictates that the higher the investment the higher the return. Why would anyone invest 1 btc when they can get the same returns for less risk?
Think about investing with leverage.
The more you leverage the bigger your risk, but the biggest your potential returns.
It sounds like he's saying you can invest 10 BTC with very little chance of losing it all, or invest 1 BTC with a relatively high change of losing it all, and get comparable returns on average.