We can't compare the E-payments such as the Paypal to cryptocurrency they have to understand first what is Bitcoin and other Cryptos they might be surprised of the price change of the Bitcoin and cryptocurrency compared to Paypal and other E-payments. Cryptocurrency is volatile.
Well, you have a point that e-payment like Paypal cannot be comparable to cryptocurrencies because of volatility but we can say that cryptocurrency can be an e-payment. Cryptocurrency especially Bitcoin is believed to be a currency in the first place but due to the versatility of Bitcoin, it became an asset to store value. However, personal, it is better to use Bitcoin most of the cryptocurrencies as a store value due to the fact that it is volatile and possible to grow your funds over time. Anyway, it still depends on us on how we will use our crypto whether as a currency or as a store value.