In the year 2130 all of the Bitcoins will have been mined and the only reward at this point is transaction fees,if most people are using Bitcoin just as a store of wealth, then there are very few transactions, which means there is very little reward for mining and so a lot of computers would pull out of the Bitcoin network. Would this be a problem? If large Bitcoin transactions occured sparingly in 2130 and beyond, would the Bitcoin concept still work?
This is again the incomprehension of working with deflationary currency, it is the disease the Chicago school of economy has installed in most people brain's, so they can fear it and let "their model" "work.
Well no.
Deflationary money is money that doesn't lose value over time, therefore you don't need "a bank paying you interest". What you keep yourself, increases its purchasing power overtime, so you get an automatic incentive to NOT spend what you don't need (contrary to consumerism).
Once you DO decide to invest or spend, the money comes from a solid source. In the current dominant mentality, they'd rather you get in debt to buy as many things as you can, and then slave yourself paying it all back many times higher than if you had waited and saved to buy the thing.
One thing with deflation is you don't need banks as much, and banks should not be operating under fractional reserve, ie, fictional money that doesn't exist anywhere but is counted as it it where (90% of fiat money doesn't exist. maybe more, its a legalized ponzi scheme).
In the end, without the banks or the debt, you save your own money earned working, and trust that i will hold its purchasing value no matter what. And if you decide to spend it, you spend it and that's it. Austrian economists don't need fractional reserve, and therefore no central banks, and of course no fiat currency. They originally advocated for gold, but i think Bitcoin fits even better.
Fiat currency you want to get rid of it ASAP, as its constantly losing value. Bitcoin you keep as much as you can. and only use what you must.