I heard it first around 2016 and bought $6k worth BTC at the price of less than $1k, which was on early 2017.
Still making profit even after the last December bubble popped.

National money will not be replaced by Bitcoin, this is because each nation is economically judge by the strength of their currency and every government would want to have control of their currency and economy, therefore governments will not easily let Bitcoin or any cryptos take over their currency.

Somehow, in future, I strongly believe that blockchain will come into the picture when we are speaking of economy and money.

I personally love digital currencies and digital wallet for payments even as small as buying a cup of coffee. (I am a very forgetful person that always forgets to bring cash).

Just wondering, if a new coin is to be listed on the above exchanges, which one will you buy it from?
Other suggestions of exchanges are welcomed