i think that bitcoin would have been more beneficial to the poor during its early days compered to now or today. i not in any saying that the poor can not benefit from bitcoin now, just that if they could have bought it earlier when it was way cheaper, by now they would have become rich. i believe why people keep on emphasizing on the notion that bitcoin is for the rich, is because the rich makes a lot of profit from it than the poor.  for example a poor guy may accumulate small stash of bitcoin for a very long time to be able to even invest like $500 or $1000. and it will take a long time to make profit and we all know that the higher the amount invested, the higher the profit return. so the rich can buy 1 or 2 bitcoin within a short time frame and take advantage of the price changes. so i believe this is the aspect people keep emphasizing on rich being advantageous over the poor.