Maybe you've heard of cryptocurrencies, ETH and Bitcoin for example, even though you haven't started adding these investments to your portfolio yet.
Investing in cryptocurrencies can be said to prepare yourself for a ride that is like a rollercoaster, with prices going up thousands of dollars one day and falling again the next. Bitcoin for example, which rose by more than $ 14,000 per coin in 2017 before falling below $ 3,500 per coin in early 2019, until now, so we could just invest in that.