Just from the title alone… I wanted to ask what possibly the best wallet to hold bitcoin in?
Before anyone says that it depends on what I need specifically then here is what I am here for. I can not decide which one really is the best based on the things I want. First of all I plan on holding some bitcoin (not huge amount) for a foreseeable future. However I also plan on swapping it for usdt from time to time aka when the price is getting high. I need a wallet that has low fees, preferably decentralized, and is secure.
Any recommendations?
You can use Bitpay wallet, it has all you want to do including ability to swap between bitcoin and vice versa. The fee is great and suitable for what you want to achieve except when the memepool is congested which then becomes a general problem. Besides, it is self-custodian meaning you are in full custody of the seed phrase as it is not stored by Bitpay. I would have recommended hardware wallets but from your post, it is obvious you are not holding for long, just buy low sell high kind of stuff. So Bitpay wallet is ideal for all that and from the review so far, I have not seen any bad reputation attached to it.
What I see is that people are giving recommendations on Electrum as well as many other wallets and Electrum is a perfect choice for storing bitcoin but that's not what OP is looking for . He was looking for a wallet that could directly exchange between bitcoin and USDT , and Electrum did not offer that feature .
I have never seen or used any wallet that features a direct exchange on the wallet, and is open source and non-custodial wallet . Is Bitpay an open source and non-custodial wallet? By the way, I saw the OP said that he is looking for a wallet for mobile version and does bitpay have a version for both iOS and Android operating systems currently?