If someone bought $100 of Bitcoin in 2010 and kept it until now, they would now have around $6 million.
Do you think the same could happen again in the next 7 years? If I now own $500 in Bitcoin could that be worth $1 million+ in the next 7 years? Or is it extremely unlikely for this increase to happen a second time?
In my own opinion, that's unlikely to happen. As we look at the trend of bitcoin price from 2013 to 2016, its price is almost not moving and playing between
$100.00 and $600.00. It was just in February 2017 when its price reached the $1,000.00 mark, and in the course of 8 months, it reached its all-time high of $6,000.00. It was also just from mid-July of 2017 to October of 2017 when its price has drastically increased to almost 300% (from $2,000.00 to $6,000.00).
Considering its volume, there are a lot more supply of bitcoin now than it was in 2010. That will make it hard for bitcoin to rise up since the supply has increased now compared to it was before. The higher the supply of bitcoin, the lower the chance for its price to rise up when the demand is low. And if ever you'll invest $500 in bitcoin today, the most possible and probable thing to happen is it will turn between $1,500.00 (+200%) or $2,000 (+300).