Real Estate investing is a proven model for wealth building for thousands of years. Crypto is not real. It is cyber digits that you cannot touch or hold. Gold or silver, which also doesn't provide cash flow, is a better investment than crypto
First of all, these are completely different areas of the economy, so you can not compare them. There is a huge difference between them related to investment risk. If someone wants to invest money for many years and earn less but safely, then he invests in real estate. Cryptocurrencies are an unpredictable high-risk market where you can earn a lot, but you can lose a lot. Everyone should decide what is better for him.