Yes you may have short term growth, this is solely due to there being less regulation.
Despite what many people think regulation is a good thing, put in place to avoid the excesses that lead to lost livelihoods. It stops whales from exploiting the poor, provides tools for central banks to try avoid depressions.
Costs wise, banks acting as trust authorities actually can theoretically be cheaper too.
Basically, crypto is more like gold rush than a tech breakthrough. And gold rushes rarely lead to much more than increased inflation.