You will need the magic number of 20 bitcoins to retire COMFORTABLY in 20 years.
20 bitcoin too small to retire in 20 years. 20 bitcoin might be worth if bitcoin prices could touch $100,000 in 20 years.
agree i think 20 btc its too small, You can get over it in 20 years. collect bitcoin as much as possible, because we do not know the price in another 20 years will go up or down