It will be difficult to say how much Bitcoin is needed to be rich because there is no such standard for the rich. However in my view, it is dependent on the location where you are living and the people interact If you are living in the village side then I think one BTC is enough, the people are not so rich in that area if you exchange your Bitcoin for your local current it will make a huge amount. On the other hand, if your connections are very strong and they are very rich then one BTC is a very small amount at least you have to have 10 or 15 BTC in your wallet. But as you all see inflation is over high in the whole world because of the two wars between Russia and Ukraine, and Hamas and Israel, the prices of things going very high so in this situation one who called him a rich person must have 60BTC in his wallet.