Bridges are risky and there are many big hacks in cryptocurrency through bridges.
Blockchain Bridges HacksA Timeline and History of Recent Cross-Chain Bridge Attacks | Analog InsightsBridging your Bitcoin to another blockchain, you no longer have Bitcoin but have Wrapped tokens. These wrapped tokens are not bitcoin and you might not be able to bridge it back to Bitcoin and get your initial value. It depends on liquidity pool and that bridge, peg of the wrapped token.
Like you bridge 1
BTC to 1 Wrapped bitcoin on Avax, what if later you bridge it back and get like only 0.1
BTC?
You are right in saying this, the risk is high when doing a transaction via bridge called on dex platforms. And I haven't tried that either because I think it's really high risk and prone to hackers and I don't want that to happen to me.
There are also disadvantages because that is true, especially when it comes to security like in centralized bridges, which usually happens that they only rely on the central authority, to manage the transfer of assets. It usually creates single point failures that become a way for hackers to enter and compromise it. And one example of this is what happened in Axie Infinity year 2022 month of March
https://www.coindesk.com/layer2/2022/10/14/blockchain-bridges-keep-getting-attacked-heres-how-to- prevent it/