it is not a good move to use fiat money to buy bitcoin and then spend the bitcoin as it will turn out to be more expensive and ineffective
the only thing i can think of is that you mine bitcoin and then spend the bitcoin you mine, however, this turn out to be ineffective as well due to the fact that difficulty have increased, and you can only mine less and less bitcoin per month
the other way is that you are the early adopter where you got more than 10000 bitcoin to spend , so you just spend it like normal fiat money
however
the 99.99% of population is not the early adopter and I can see no reason why anyone would spend bitcoin , anyone please think of a good idea how can we solve this
we are still in the transition between innovation and early adoption. bitcoin industry EG retailers, suppliers, etc is growing fast but not yet at the point were the general public are ready to use daily. so dont think early adoption has passed.. its only beginning.
many people that are not true bitcoiners. that just want it as a quick couple month profitable investment. they are not innovators or adopters. they are still tied to their FIAT, so dont worry about them as all they want is naive noobs to buy their coins so they can cash out. for the rest of us we are trying to aspire business acceptance and to grow new enterprises, while atleast trying to weed out and destroy harmful scammer attempts.. so as part of the innovation stage, dont worry about joe public just yet, concentrate on business expansion, making more uses of bitcoin, making new features and benefits to using bitcoin. and the easiest way to do this is to think "if i had X bitcoin, what would i like to do with it?" and try filling that void or aspiring others to fill the void
but inshort: you are correct bitcoin is not ready for the 99.99% of adopters (joe public)