Once I have talked to a guy who has bought 1000 BTC at $0.15 per coin.

He SOLD them ALL at $1000 per coin.

He said his brain could not hodl any longer - $0.15 to $1000 swing was to much he could stand mentally.

Yes, He got 1M gain, virtually for nothing. Bough new nice house, few new cars, many nice gifts for his relatives.

Imagine now yourself in his shoes, and thing where is BTC today, and where it will be in 5-9 years.