doesn't need a solution to high transaction costs, the transaction fees charged for send bitcoin is already at a low point if you use blockchain currently they only charge satoshi 10k ++.
0.00010000 =$0.06
thats an hours labour in a few countries.
bitcoin was suppose to have no barriers of utility/entry.. yet i cant see anyone being happy if they were told it would cost an hours labour just to move funds.
yes it gets "profitable" to use if they want to move 50x the fee in one go. because thats 2%, compared to visa/mastercard/paypals 2.5%.
but then bitcoin only becomes useful to move a weeks wage, and not really worth using to spend on anything smaller then a weeks wage.
and this is why bitcoin is only being used day to day by the developed countries, while developing countries dont use bitcoin for its intended purpose. but will try scamming users, spamming users to get their hands on a few cents via ponzi's, sig campaigns and faucet raiding