I have always been interested in mining cryptocurrency in a very long time and my biggest obstacle has always been the financial resources to purchase mining rigs and electricity required however remaining crypto-currencies became almost impossible for me because of the high cost involved and very low profit margin so I am pumped to ask that with the recent pumps in crypto prices and everything going to the moon is it profitable to mine Bitcoin in 2021 or any other altcoins please let me know.
Mining bitcoin requires a lot of capital, if you have a lot of capital then mining bitcoin is still profitable, but if you don't have large capital I suggest you don't mine bitcoin and choose to mine in other ways, such as holding coins that support staking, coins which uses PoS consensus created to solve the PoW problem because mining consumes a lot of electricity consumption.
Examples of coins that use PoS are like Zilliqa and Cardano, you only need to hold a few coins then you stake, and you will get more coins as a reward for holding these coins.