Stock market, bonds and real estate are popular choices to diversify out of crypto. You'll be looking to find sectors and assets that does not mirror the trajectory of the assets you currently hold.
Being a Bitcoin inclined forum, most of the investment advice here is around crypto. You'll want to find other sources to learn more about these assets and make your decision based on what you learn.
I also advice people invest in themselves by learning a skill with a good ROI and which won't be easily replaced by technology.
Stock market might be a good option only if you are well aware and updated about how different companies are performing in your country. There are scores of companies listed in stock market and we have to pick the right one, which is a challenging task. While in case of crypto, we also have countless number of coins but we now have idea that investing in Bitcoin and holding it for few years is an excellent strategy. Just spend some time on tools that give results of doing DCA on bitcoin over a certain period of time in the past and you will have the idea.