No Bitcoin is not for the wealthy alone.
Though high transaction payments and coverage by the media may make it look expensive, yet it's divisibility implies it can be used by anyone. The real effect lies on the individuals and groups adopt it, it has the potential to serve as tool for the rich and also as a begining point for anyone going for financial inclusion.
Perhaps some poor people, considering its already quite high price, have assumed that Bitcoin is only for the wealthy. In fact, anyone who wants to buy Bitcoin is always welcome, regardless of their status. This is the unique thing about Bitcoin: it can be obtained by anyone without having a lot of money up front. However, if you want to buy a lot at once, you obviously need a lot of money. However, if poor people are patient enough to use their time and buy in installments from their monthly income, that's not a problem, because such installment purchases can also build up a large amount of Bitcoin, even if it takes a little time to acquire larger amounts.