I fail to see why any legitimate business would be willing to accept the Bitcoin in exchange for goods or services.
If two or more pople accept it as a medium of exchange then it starts to hold value.
Because it is cheaper than Visa and MasterCard.
0% vs 2% or more.
On a couple hundred thousand in charges a year it can add up to real money.
Bitcoin processors will convert to fiat immediately so the valuation fluctuations are not an issue.