It will really depend on which country he lives in and how old he is, if he is a citizen of a prosperous country then having 1 Bitcoin is normal, especially if he is still young and has a lot of income but if he is a citizen of a poor or at least developing country and he is older entering retirement then he can be said to be rich because I am quite sure that people who live in poor countries and are old enough will face difficulties in being able to have savings or investments worth tens of thousands of dollars, even when they are still young and have an income, there is a big possibility it is still difficult to meet his living needs, so tens of thousands of dollars might be very big and could make him one of the richest people in his area but the opposite could happen in other areas.