Interest rate in Bitcoin is really greater than any other physical asset. you know last year the lowest price of Bitcoin was $4k and now the price is over $66k. So mathematically Bitcoin gave near around 1600% interest within 1 year, tell me which asset will give you this much profit?

Yes, One of the safest things in the world is the Bitcoin hardware wallet. Once you have accidentally lost your wallet's private key, no software or developer will be able to recover your lost funds unless you disclosed your P.key somewhere. So, secure your key, your funds are 100% secured.

The above really puts in perspective all the things that can happen when your money is in someone else's hands. There are risks by holding money in a bank where your money is getting thinner and thinner because its value drops over time.

While with crypto you keep your own money and you can earn rather than lose over time, and in some cases if prepared to wait for a longer time you'll be rewarded even more. This is in fact the opposite relationship to fiat.

So why wouldn't there be an ever increasing interest in Bitcoin?

You need to hold your Bitcoin if were afraid. Not your keys, not your Bitcoin either. You will have to think about that...
Everyone must have to understand that being in this form of investment guarantees nothing but if you can manage it so well, even it has just a lower interest, it can be good enough. What I mean is that you don't need to get into a higher interest rate as that seems unrealistic. Some put their Bitcoin to exchanges for this sake but the risk is too high, never do this if you can't afford it but rather keep it and wait for the right moment to sell.

I only started using Binance's earn function which has a pretty low return for my bitcoin but since I am still hodling on to it, I might as well put it there to get some satoshis even if they're dusts. I think that there's not a lot you can get from bitcoin if you look for interests in any platform, bitcoin's just too big and we always have to look for equilibrium.

When you’re making use of a trusted platform, then this shouldn’t be something to worry about.
I have seen a lot of exchanges and other cryptocurrency platforms that offers this interest feature on bitcoin.

Yes, not having your keys means that you don’t have complete control over your coins, but these platforms can be trusted.

Platforms like Nexo.io, Luno, Crypto.com, Blockchain, etc. They are reliable. But even at that, you still have to understand that they can’t be perfect, so it’s up to you whether you would like to make use of them. And yes 6% is the highest profit that comes staking bitcoin on these platforms. There are other coins and tokens that can generate more than that. If you Crypto.com’s native token, you will make up to 20% interest.

6 percent profit is a common thing that also given by the central bank of every country . Even if we are stacking USDT, BUSD we will get 10 percent APR interest . then why you think bitcoin staking is good with 6% interest . Where the price of Bitcoin constantly goes up and down and where there is high risk . So I don't think buying bitcoins for staking is a good idea . But if you are a bitcoin holder.  Then you can do this it will give you some extra profit

Giving the private key is the most fatal mistake we make because that's where others will come in and drain our assets, so in this case we have to be careful, and investing in bitcoin in the long term is a big profit that we can definitely get and will pass the interest we predicted, but this will wait for a fairly long time as we see today the decline in bitcoin is very large and it takes time to be able to back to the highest value.