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Yes the bitcoin transaction fee is sometimes high due to mempool congestion, but with the introduction of the lightning network this issue can be reduced. So for large transactions I would advice the use of bitcoin because it is secure and also has value
But what happens now, the lightning network is not so developed because the developers of the lightning network are still very limited.
Even though the lightning network is a solution for fast, cheaper, and more efficient transactions.
Looking at the Bitcoin mempool congestion a few months ago due to the buildup of transactions caused by Ordinal NFT.
Fees are very expensive and the confirmation time is very long, I need 10x the usual fee with a confirmation time of more than 24 hours.
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There are also hidden fees when using bridges between blockchains.
Bridges between blockchains are more expensive and the average usage cost is also the same for each bridge platform.
It also depends on the amount of gas fee at that time.
As happened in the ETH network, sometimes the gas fee rises, and the sending fee will be more expensive.