Alternative investments have vastly outperformed a lot of asset classes.

Of course, there are risks involved but I actually think that risk-adjusted returns wise they can actually continue to return more than market indices over the long run.

However, the catch is that you need to make sure you understand how it works first before putting money in. It's not as simple as buying an ETF.

Also, don't put money into securitized versions of these alternative investments (e.g. fractional art, that just doesn't make any sense to me).