While all of BTC's features are great, the main draw is its decentralization. If btc weren't decentralized, even with its many other features, it wouldn't be valuable. However, I admire you for creating such a beautiful BTC illustration
If you think about it, it's hard to see any drawbacks to BTC other than when the internet and electricity go out. It's no surprise that many large companies are buying BTC, seeing it as a valuable digital asset. Even with BTC price fluctuations and bearish and bullish markets, it's one of the most appealing aspects of BTC. For wise people, rising BTC is certainly a pleasant experience, and falling BTC prices are also a pleasant experience for some, as they can scoop up BTC from the bottom and hold it for the long term
Well, there are some drawbacks or cons in Bitcoin as well, and the most disturbing one is probably the fact that the network gets too congested sometimes. I know, it doesn't happen all the time, but when it happens, it becomes pretty difficult for people to make normal Bitcoin transactions, because you obviously wouldn't want to pay very high fees for normal transactions, like paying $5 for a $20 transaction, which is 25% of the total amount, and that's outrageous.
However, as I said, it's not that big of a problem because it doesn't exist all the time, but since it happens from time to time, it can be considered a drawback or a con within the Bitcoin network or blockchain. Other than this, I also can't think of a drawback. People can make things up, but their claims aren't true. Decentralized nature of Bitcoin has made it one of a kind in the current era, we could never think that we will one day have a decentralized financial asset that we can use to keep our funds as well as transfer them to others without any involvement of a third-party.