Defi some coins will just become worthless in coming months and may be handful may still exist, but its value would fallen a lot from its high. Now not sure if it can anytime in future cross its ATH price or no. So I am avoiding tis for now and once it has fallen drastically and reach its bottom then can think about its future and may considering buying it.
Nevertheless, DeFi will survive. The influx of new users who came to the crypto world thanks to DeFi will affect the development of other projects. This is at least indicated by the growth of the main sandbox of DeFi projects, Ethereum.