Moore's Law will sort it.
Remember 8" floppy disks, modems at 300 then 1200 bit / sec.
Bitcoin relies on exponentially more power to create each new tulip, and the world needs power to do things of value like keep warm in Texas. Yep BTC is a pass the parcel (can't say product) greater fool theory concept.
J6P will be fleeced. Some techie will develop a better mouse trap and the tide will go out very very fast. Unlimited down, no buyers.
Sure there have been better places to invest than gold or silver, but no amount of time will change the metals. Moore's law just doesn't apply. One thing I have come across is the very very clever guys at Mint (mint.bio) who grind down e waste and set a bunch of microbes to work eating gold from the liquid slush. The microbes grow fat and lazy, only to be sent to the crematorium where after the smoke settles we've got gold.