Layer 2 solutions and the lighting network bring scalability, speed and low cost. Poor people prefer to use a brand they recognise rather than some obscure coin that may or may not succeed.
Venezuela and Nigeria are using Bitcoin for everyday transactions by the millions, in El Salvador is legal tender. You can easily pay for a coffee with bitcoin in many places and it’s cheaper and faster than using dollars.
Bitcoin is divisible by 100,000,000 Satoshis. This is the real medium of exchange.