1. it is less stable has compared to other centralised stable coins like USDT, USDC BUSD etc
2. It has low market cap, look at the amount of trading volume USDT had yesterday, DAI can not sustain that level yet and with
better adoption and trust level the marketcap should increase.
3. It is tied to Cryptocurrencies and we all know how volatile the space is, if the price of Ether used as collateral dump like 20% to
30% a lot of these depth will be called and close.
2. I strongly believe that there are not many people have real problems with liquidity of trading pairs with DAI on big exchanges. It is both the trading volume of coins and the amount is traded by one person. Not all of us are whales or have big capital to get troubles with trading. The real issue is the spread can affect your trades. The lower the volume is, the higher spread can exist.
3. You have trust in companies, governments when you join the centralization parties.