You know that banks and gold are good to invest for long term. Your banks investment will earn few money interest within a year/s, it is safe investment though.
Your gold investment is safe as banks for both are stable investment.
If you invest in cryptocurrency the higher risk because of unstable movement of market. The chance to win higher profit than gold and bank investment in a short time is possible (know as quick rich especially in bull run), the same to lose in a day(drastic fall). By the way it depends on what kind of your crypto investment.
In some time there are circumstances and unexpected situations in cryptocurrency but why need to believe that it is good investment?
In some point you are right, bank and gold are the safest place to invest. That's why everyone told that only if you have extra money only then invest it on crypto. But if you are going hold cryptocurrency (BTC,ETH) for 5-6 years like gold and other bank policies you can get a good amount from it, at least the profit will be more than 2-3x than gold and bank investments.
in fact gold is a very attractive investment and has been used for a long time from a long time ago, even though the price has not changed too much, but this is the safest investment and just like we save money in banks to make deposits, the interest earned is not too high but this is clear. safer than gold, of course.
Crypto is the same as forex trading which can always change at any time and needs proper analysis in contrast to gold and banks that don't need that analysis.
because if you analyze it wrongly, you can be sure that we will experience a lot of losses, but with a high risk, we will also get multiple benefits.
they cannot be equated, but if the matter of investment is the same, it can be used as an investment, it remains only to determine which one we will use. if I believe crypto is a very promising investment and can be expected in the future.