Well, if you have a separate budget for every purchase/investment forms then you shouldn't have a problem with buying yourself something on a great discount - that's how I organize my finances. If you don't, then you have to be at least disciplined not to go overboard with spending money you could've used to invest (of course, spending Bitcoin directly is not wanted at all).
It all depends on how organized are you personally, it will reflect on the investments you make.
As for Black Friday, I've seen some good deals and I have made some purchases but only on stuff I already intended buying and I knew the price before so I made sure it's really a discount and not a marketing trick.
You can genuinely find some good discounts but there are also many fake discounts you should watch out for. My strategy is following the price of my wishlist items so I know if a discount is real.
It's interesting to explore the human mindset's susceptibility to
amazing offers. Budgeting for certain investments or purchases is wise. Behavioral economics shows that discount excitement often trumps logical budgeting. Even with a separate budget, overspending on discounted things can lead to a psychological trap where we excuse additional purchases. This conduct, intriguingly, often reallocates monies that may have been better invested.
Your point about Black Friday is correct, yet deals are everywhere in retail today. Black Friday has become a cultural phenomenon, a shopping
holiday where social excitement boosts spending. Actually, smart buyers like you can locate better bargains year-round. This begs the question: is Black Friday more about community consumption than actual savings? Deals that happen discreetly but frequently throughout the year may be more profitable.