Investing in cryptocurrencies is a smart option as it's validity is increasing day by day in the market. Yes investing in the only bitcoin can be uncertain as because of the volatility of the market but there is a way to determine a bit stability.
By investing in crypto index funds.
You can ensure a bit stable income by diversifying your portfolio to eliminate the risk of investing in a single coin alone.
You can know more about it on libertypool.com.