i'm thinking about investing some btc's but not yet 100% convinced

can someone convince me in e couple lines why i should invest?

1 btc for 100 coins is a lot for me, but when there are for example 1.000.000 coins and the price of 1btc is 1000€ then 10€ is the price for one coin

then the marketcap is 10.000.000€, the price can easely double, tripple or more...   when you look at marketcap.com

or did i just convinced myself?