I would say not only bitcoin but whole cryptocurrency world will share trillion of $ as marketcap after few years. 100 billion USD what we have today is nothing if compared with the size of global economy.
Yes, look to other market, we can see 100 billion USD is very small than major markets in the world.
It only have 1% of the global market share
Yes, not only this but also;
Fiat around the world is heavily infested with:
-fraud (false claims & laundering & insurance-related & chargebacks)
-frivolous legal costs (lawsuits bogging the system down)
-corruption (crime official and unofficial - governments and gangs, banks and conartists)
-social obligations (debasement in value to keep up with payments from government or other retirement-obligations)
-fake credit (goods being transacted with credit-loss, replaced by inflation of monetary base rather than bringing perpetrators & source to justice)