Real estate is the safest option. You generally get the money you invest back in 10 years if you rent it out and also protect yourself from inflation in fiat currency. Furthermore, if you change your mind, you can sell your real estate whenever you want and get back around the same amount you invested (depending on housing market price).
Real estate is definitely better than leaving cash in the bank to gain interest in my opinion. If you want to take on more risk and potentially earn more, investing in commodities, bitcoin, and stocks are just a few of many options. Depends on how much risk vs. reward you want.