Over the past few years, I have been buying a little ether tokens, as well as BSC.
I have quite a lot of them and here I find a very expensive gas for transactions.

What is the cheapest way to exchange tokens (ETH/BSC/POLYGON) for Bitcoin?

Hello. I would like to get some advice from you.
I need to exchange several bitcoins (3-5) from my electrum wallet to DAI stable coin.

1. What is the best way to do this? Exchange without KYC? Atomic Swap? (NO centralized exchanges)
2. Which wallet should I use to store DAI ? (I'm a little scared to keep such a sum of money in a meta mask in my browser)
Are there any analogues of electrum for ether tokens?
3. I chose DAI because of its decentralization and the inability to get a coin lock. Do you think this is correct? (I will keep the DAI for about 1-2 years)

Thank you for your advice, community!

[same seed phrase and add thirteenth word]

Hello.
I have electrum seed phrase witn some bitcoins.
I want to create new eclectrum wallet with same seed phrase and add thirteenth word at the time of setting up the new electrum wallet.
To move all the funds from the old seed phrase (wallet) to the new one (same seed + 13 word).
Is it safe? Are there any possible errors?