Both are important and one will have no value without the other. Value is determined by supply and demand. But if the market stays the same, no one will be interested in it in case of market importance. If the market keeps on rising at a constant level, people will keep on buying and never sell. The same goes for constant dumping. People will only sell and as it will never go up, no one will ever buy again. So in order to keep the market running and people making profits and losses, we need both situations. I mentioned losses because one's loss is another's profit.
Some see the bear market as a bad thing. Because the price is dumping. But for those who are aware of the opportunities they will get in a bear market, it is a good thing to them. Because as you mentioned in the OP, they can fill their bags with more Bitcoin so that they can make a profit later on. But in order for this to happen, a bull market is necessary. Because you can only make profits when the price will rise again. So they both are connected and if you know your stuff, you can take advantage of both situations. So, I prefer both. One is useless without the other.
There's a third perspective that we could consider - the sideways market. Its where the market neither experiences a significant uptick (bull) nor a major downswing (bear). In such a phase, the market moves horizontally, presenting yet another myriad of opportunities and challenges. In fact, in this stage, investors often consolidate their positions and can also test their strategies.
Additionally, the relevance of a bull or bear market might not matter to certain types of traders, especially day traders, who make profits from small price fluctuations within a day. For them, market direction is irrelevant as long as there's volatility and liquidity.
The sideways market is the most annoying and I hate the most if someone asks me. Like what's going on, bitcoin has been sideways for the past 7 weeks and hasn't had any significant volatility that would annoy short-term traders like me. Bear markets or bull markets are both profitable markets if we know how to take advantage of them, but sideways markets are really annoying.
Indeed, as a long-term holder and day trader, I don't see any difference between a bear market and a bull market, I find them to be almost equally important.