Using DCA can be a very easy and efficient approach to long-term investing, especially if employing bitcoin.
We can only employ DCA in our investment and not employ Bitcoin in DCA.
Bitcoin is an asset of far higher stability.
This depends on what you mean by stability. Bitcoin is known to have been very volatile ever since it originated. There has never been a time when the price was stable. The price can swing by thousands of dollars in a matter of days or in hours. Yesterday Bitcoin was $80 and today it was above $82k. But if you were referring to longevity, especially in terms of technicality. Then its sure counts for stability. Because it has been around for over a decade and continues to grow both in adoption and value. To date, it is still decentralized and has proven to be one of the best assets to invest in this era. However, it's a highly speculative asset and very unpredictable.
What am saying in essence here is that the stability of Bitcoin depends on what you think of it.