He was confused at first because he heard that it was unstable and risky.
Judging from this graph , Bitcoin investment profit is a steady process and that is why it is adviceable to invest in a long-term not short,the growth from the previous years is visible, fruitful and there have been no year it has dropped below the instead increasing, therefore to me its risk is not as compared to other crypto,since the risk are being recovered.

Crypto is volatile and even though Bitcoin has proved itself to continue to rise even after each dip, its price is still unstable.