If Bitcoin hits such price levels, many early adopters will become millionaires. It could be tempting to either sell all of your Bitcoin or "hodl" it for the long term.
I guess there are already many millionaires from the early adopters (and maybe even billionaires if I'm not wrong).
What will you do if Bitcoin hits $1m in the future? Will you sell all of your Bitcoin for cash? Or will you go long in the hopes of Bitcoin reaching higher prices on the market? Will you donate your profits to a charity? Just curious to know. Your input will be greatly appreciated. Thanks. 
TBH, I don't even hold such a significant amount of BTC, so I think it's not my cup of tea to think about it now as I sold all my BTC (can't stick with it and IRL needs). But if I held them and the coins be with me, I'd definitely donate it to the real heroes who are working 24/7 to help their patients fight this pandemic.