Right amount to hold Bitcoin

Lately, bitcoin has been recovered, rised, and finally touched its all time high. It's been almost a year since when it collapsed by that terrible Terra-Luna shock. Only a year. What a volatility. How could anyone keep hold such a bumping wave? No way, unless keeping a faith and principal in our mind.

I have been keeping one thing firmly pinned to the back of my mind. "Keep holding an amount which you can stand and go to the workplace if Bitcoin's price falls to zero." I don't remember who's wisdom it is, anyway, it sunk deep into my mind and fitted to a hole so that neatly. Since that time, I kept to buy some amount little by little, and then some time, it came to 0.1 BTC. Then I felt this was it. The point of no return.

0.1 BTC is nice for me, for now. Not to feel too less, nor too much. It might be 1 BTC for someone, or might be 0.01 BTC for the other. That depends on your economic state and the period to buy. Or might on your faith for the future of Bitcoin. As like me who can't buy 1 BTC for current price (70,000 dollar), people in the future a few years later may not be able to buy 0.1 BTC anymore. Or in the future, Bitcoin might caused a defect and all the long time holders leave it. Nobody can predict which is right, so I stick to this "0.1" principle.

If you have your own way, tell me the holding principle!