As with any currency even dating back to the early days, where Barter, Cattle, Cowrie Shells...and so forth, all gave way to new way to create value to expedite trade efficiencies...devaluation over a long period of time destroys value and currencies..
I like decentralized currency...Bitcoin, ETH, $AABB
Bitcoin, is limited and decentralized so it's valuation lies within.
AABB is Gold backed, or PM backed and has value because of that backing. Like the US dollar use to have some PM backing.
Bullish