I think it is not necessary to buy bitcoin everyday specially in times of bull season, because it is so risky to buy btc during bull season, the best time to buy bitcoin is during the dip but not everyday we need to make a proper timing to buy because it involves capital so we need to be careful to avoid loss.
To you is not necessary, but to some people that have the money to invest in BTC, is very necessary for them to be buying BTC everyday and hodl for long periods of years before they can sell because their major target is to sell when the market price will double their profits. If you understand how this BTC hodling work to favour those that embrace the risk, you will enjoy buying BTC both in the bull run and in the bear run.
But if you are not financially stable, don't buy BTC when the price is high because it will make you to struggle to earn little profit from your hodling and it will not encourage you to increase your capital.