From last summer (2020) the Decentralized Finance (DeFi) with the tokens associated was a success but in the same time gas fees increase a lot. In my case I was more familiar with the Binance Smart Chain (BSC) thanks to the Binance ecosystem which help to get the cheapest gas fees at this time.
Actually most of DeFi projects (check Finance DApps here) are linked to the Ethereum Blockchain (30 transactions per second), and many people are thinking the problem of scalability will be solve at the end of the ETH 2.0 process but you don't need to wait this new release.
In fact most of us are waiting for Layer 2 which open a new period for DeFi , the DeFi 2.0 in terms of scalability improvement i. e gas fees will decrease.
This step is very important to open the DeFi 2.0 to everybody. For implementations in Layer 2 nowdays, see Synthetix Layer-2 , Loopring Layer-2 and I hope a decentralized interface like Uniswap and other platform (1inch, DYdX, ...) will follow this way very soon (today is Feb. 5th).
Next summer (2021), gas fees on ETH Blockchain - thank to Layer-2 or DeFi 2.0 - will be an old memory.
NB: Here is an opportunity to earn $30 in DFI in three steps ( DeFIchain is a decentralized Blockchain site with a low market cap based on Bitcoin ecosystem, now listed on Kucoin) :
1) Register on CakeDeFi´s website and fully verify your account (KYC) here
2) Make your first investment $50 (BTC, ETH DASH,...) and get a bonus of $20 of $DFI. (Note that this bonus will be staked for 180 days but there is staking returns during this time)
3) If you use my referral code (303513) for registration, you will receive an extra $10 of $DFI, which will also be staked with returns.