If it does go of the ground how long will it manage to last.
Without hyper-inflation wealth loss is about 2% per annum.
Well,,, Tether managed to last many years and it seems survived a few disasters and seems to be stronger than ever. I do not see why not the same for Libra, and it has even more power and more connections. It will be something for sure,,, but not the big brother coin people think it will become.
10 years = roughly 20%?
Tether last as long as the Dollar it is a stablecoin like Libra or other stablecoins, the only difference Libra price is not = 1 USD as based on several fiats and "other assets."
Tether is just another name for USD, selling USD to buy something equal to USD (minus fees).
Selling tether something equal to USD to get USD (minus fees), end-result almost money back just some small fees down and hope exchange does not close and run with money.
If you are happy with 20% wealth loss in a decade and retire "poor" thats your problem to deal with.
Libra is a money grab, nothing else, Google, Amazon....will follow in the money for nothing endeavor.