i have been scrolling down the bounties section and seen so many projects related to Defi and Bitcoin but i cannot understand how the new project like Defi is giving a hard time to BTC and even to other altcoins like ETH and ripple and many more?
every post and campaign i am seeing is about Defi and its making more money than others/
why?

Please understand that defi has no competition with bitcoin or ethereum. Infact defi is a sub product of crypto market and is most like providing financial services to crypto users and we will see defi will be offering most of the financial products in maximum 2 years time.