Some day in the future, you will realize that the best time to invest was not today, but some other day in the future, when prices were low. But with the information that you have today, the best time to invest is still today, because you do not know when prices will be low, and you do know that the longer you hold your investment, the more time it has to grow.
Toughts?
this is a great quote, i am heavily invested myself and do believe that bitcoin will one day rule the world, make banks obsolete and be a borderless worldwide currency.
Don't get ahead of yourself though. It might well happen, but you shouldn't put all your hopes in something that could well fail for something else (an altcoin, a newer form of currency, large bugs that are exploited etc). Make sure you diversify, at least a little bit, especially if you're saving a large amount of money.