If you holdl from january 2013, you make about a 1000x in 5 years.
This is a good reason/evidence.
So you want to say that Bitcoin will never drop? Please in whole history of stock - find me company or anything that never ever dropped? Please
Sorry but I am not rich - no one gave me anything. Right now I will try on 0.175btc and HODL not looking on the price. If it goes up for uptrend I buy more. If it goes down - oh well that wasn't so much.
You ask for a a good reason/evidence.
I give you a good reason/evidence.