It depends on you really, if you are wasting 1000$ per day you will need a huge amount of bitcoins. You are using 10$ per day, ok you need in 100 times less bitcoins.
It may be that bitcoins do not hold any value after 20 years. Bitcoins are not a reliable currency currently and it has been here for very less time compared to other currencies but the future of bitcoin is not predictable. Soon it may be replaced by another currency.
Yeah and thinking of 20 years would be the waste of time, its better we keep on earning from it since it is alive and popular as anything is possible with bitcoin in future.
In 20 years, the price will be around $100,000. So you need about 20 bitcoin to live happily, no worry about money at all.
thats a lot of good ideas i must admit though im not so confident about the price of the bitcoin and i dont know if it will grow that much in the future thoguh its always good to be optimistic
hopefully it will be enough to have at least 100 bitcoins in order to retire then, though unfortunately i dont have that much bitcoins right now so i will not be able to retire after 20 years
Even if you think of the worst price and worst scenario of bitcoin then also I think that 100 bitcoin would be more then enough to take care of our good retirement life.