Everybody has he's or her own. the main issue of cryptocurrenqcies these days can be either stable for a long period of time, or they can stay highly volatile for a long period of time. Nowadays, cryptos are more stable than stocks, but I don't think it will be a very long-lasting trend, because all traders are familiar with cryptos. this comparison can be determined only by a thorough technical analysis or a fundamental one if we talk about long-term intentions.
Most cryptocurrencies or cryptocurrencies in general are not stable coins as their volatility differs from the other and fluctuations occurs from time to time unlike fiat that is a stock exchange but I don't think that all traders are familiar with cryptos as most of them still make use of the Fiat currency even for their long term tradings. You know stocks is more of trading than investments whereas Bitcoin is mostly concerned about making and owning investments for long term goals.
Bitcoin volatility is not a joke and cannot be compared to that of stock even though the stock exchange market is more visible than Bitcoin.