this is like people saying gold could not be money again because there's not enough per person.  it's a matter of price.  the price only has to go up for you to not need as many ounces or in this case coins of golem to be able to pull off more and more transactions.  i wrote about this above in fact.  this is why the market cap of golem, if people choose to use it for buying computing power, will have to go up into the billions.  whatever the size of the markets is it takes over it has to be many multiples of that.  for instance if the market for computing wind directions is globally a $1 bil (let's just pretend as idk what it is) and golem absorbs a quarter of that market by moving around $250 mil per year then the market cap of golem has to be many times that $250 million dollar amount to ensure that there are enough coins to move around.  at a fixed coin supply there is no other option.  of course that is not the only market golem can take a bite out of.  i estimate that within a few decades golem could take on dozens of markets if not hundreds and be moving around billions per year in which case the market cap of golem would need to be at least tens of billions, maybe hundreds of billions. 

this is not to say golem is guaranteed to be the currency used here.  if the devs do not discover a way to ensure that from the moment someone buys golems to the moment they pay for their computing power the price stays the same for the project then if someone buys golem only to see the price go down before they pay for their project the whole thing could collapse.  i have not seen a serious enough look into this.  on the golem blog the devs mentioning a sort of coffee backed standard which is to me a joke. 

anything youd like me to clarify?