I think it's true, because if the btc supply decreases every day it will cause the number of btc to remain at 21 billion, which will cause prices to increase because of the rarity of btc. but there are also other factors that cause prices not to rise or even decrease, namely whether investors or traders still want to trade btc in the market or not, if the interest from btc is still very much then it will be good news, vice versa