should i now join defi on uniswap?
Only if you have token already listed on Uniswap. check the token list here >
https://tokenlists.org/Defi being listed on Uniswap or Binance doesn't mean it genuine, dont you notice that 97% of all Defi project dont provide information about their team and where their reward c? Even Cz Binance advised investors not to invest in Defi because it was listed on Binance.
On Uniswap you can't find the signup button, you must prepare your wallet like Metamask, Walletconnect, Coinbase wallet, etc to connect into Uniswap application.
I think he should understand the this by now since it was explained before