Wouldn't all players naturally unlock all things and have the same skills eventually if it was uncapped?
By allowing a single character to become master of everything there is no need for a Multiplayer economy if everyone is self sufficient.
That being said I know this has been a very mixed topic because some people want to unlock everything. But I would like to hold off discussing this until more details are in place.
At the end of the day, it's a number and a number can change.