You have the same issue with Bitcoin, because it is deflationary it is in the holder's interest to not spend it, because it's future buying power will be increased.
So if you look at how bitcoin was distributed you have early holders that have a tremendous amount and have been rewarded for it.
Add to that speculation and you have this whole cycle ramped up on steroids, with huge swings up, and then down, and all the while the value continues to increase because it is designed to do so.
The problem was that bitcoin tried to solve two problems, but should have only solved one.
The first problem was how to transfer value in an untrusted network which was a great success.
The second, was unneeded, which is to make it deflationary as some sort of perhaps response to the inflationary world we live in.
But the reality is that the inflationary world was designed by economists so that wealth continues to circulate. Yes, there are still issues. Yes we have imbalance. But inflation does case wealth to circulate, though not as quickly as some would hope for.
In bitcoin, you have the exact opposite, wealth gets accrued to early backers and just sits there.