I follow chandlerguo on twitter and he says that each person must have at least 1 BTC, and don't wait too long to buy, because the price tends to rise, consequently it will become more difficult to buy 1 unit. I will do what he says, save 1 BTC, even if i have to save until 2024. I remember reading these days that John McAfee believes that 1 BTC will be worth 500k in three years, and in my opinion he's a smart guy, it would be great if he's right