I've always had insomnia and been a late riser but Bitcoin took it to the next level.
How is yours?
It was much worse for me in 2014-2015. Alarms going off throughout the night.... And I'm on the west coast in the US, which was horrible timing for a regular sleep schedule, since so much action revolved around the London session and weekly futures settlement. I don't know why, but it always felt like 1-4am was the best time for volatility. Horrible for getting up for work at 8am.
Things are better now that I only trade on the daily time frame or higher.
edit, what does this have to do with speculation?
Always been a relevant topic for bitcoin traders.

True, time is one of the decisive factors against rising prices and it is very important for traders, especially day traders. Sometimes, when the eastern hemisphere is in a resting time of about 12am - 4am, market movement in the other hemisphere is very stable because indeed, most market movers are there. This is sometimes the reason why the sleep time of a trader is not like people in general.