If bitcoin achieves that price in future then I will sell all the coins that I would be holding and with that money I would start my own business from where I could manage to get regular income.
That is a good action. When the price of bitcoin is that high, 100 bitcoin can buy you a lot of things.
If price is in millions then even 1 btc is enough to have a luxury life and a good business, and in my country with that amount I can live like a king and I won't need 100 btc to live a good life.