It is so simple that it is ridiculous. How can I be a millionaire by just investing $60. Guess what? My friend had bought 0.5% of all bitcoins existing in 2010 (it cost less than $10k to do it). He told me to do likewise. I said: "Bitcoin is so small I don't care." He said: "When it is big, it just costs more to have the same number of them."