I think Real estate and Gold are safer but Cryptocurrencies can bring a lot of profit if you have a exactly choice. For me, i only invest in cryptocurrencies 30% my saving money.
Its very wise to divide our investment. Crypto is high risk investment, different with others because others already exist more than 100 years and bitcoin only 10years. I think in next several years, people will know about bitcoin and think bitcoin is safe investment like gold
It is not about time it is about potential if you notice bitcoin has ability to give more profit than all other investment in short time and other investment take too much time to give even miner profit, so I for me there is nothing more profitable than bitcoin, I buy bitcoin only to hold it gives me satisfaction and it saves my time for better.