1. If someone is holding btc, does it really matter since the price keeps fluctuating assuming you are not selling anytime soon?
Exactly right. It doesn't matter much. The price may keep fluctuating as much as it wants, but if you are convinced that bitcoin is destined to become the store of value that it is, then it doesn't matter much.
I mean this really affects people who daytrade or swing traders right? Because if someone is daytrading, obviously prices of btc at any time counts.
If you are a trader (a good trader, that is), then such huge swings, if anything, should be a positive thing because they bring the opportunity to make more money.
(1) Everyone has their price. Sure, some people say they will hold for ever...they're hodlers. But everyone has a price at which they'd love to sell their bitcoin to buy something they may need, if not something practical than the Lamborghini that proves "they made it!"
This is a good point. No one is holding just for the sake of holding. At one point, we would all want to sell to fulfill some need. So, if the price prediction for the next 10, 20, or 30 years turn out to be true, probably only the really wealthy ones would end up holding bitcion.