Bitcoin is a gambling mechanism, nothing more nothing less. Despite lofty goals of a decentralized currency that anyone with a computer and internet connection can use anonymously with no string attached, it’s become just a slot machine. Almost all Bitcoin holders are just investing, hoping to sell their BTC when the price goes up. The few actual uses of BTC as a currency are mostly limited to shady Dark Web drug and gun forums.
The ridiculous price volatility of BTC combined with the several hour transaction wait times make it nearly impossible to use as a normal currency.
Bitcoin isn’t mainstream, it’s just talked about more.