Definitely not... People who are poor are still using bitcoin on a daily basis, a lot of people here on this forum arent even from first world countries. As long as you have access to internet you have access to bitcoin, its not something that is only aimed at the rich at all.
I disagree with you. Poor people can't use bitcoin because it's expensive itself and its transfer fee also is really high. I can claim that in many countries, conventional bank wire is much chepaer than bitcoin transaction. Nowadays, it can be used by only middle and high class people.
take a look at bank transfer fees overseas and compare that to bitcoin transaction fees.
you'll see a huge difference. someone working remotely overseas would be losing out on hundreds of dollars per year if they were using traditional banking system compared to btc