Today, Litecoin $LTC founder Charlie Lee said in an interview that he regrets creating Litecoin. If he could say one thing to his past self, it would be to only buy Bitcoin, not to start a business, and not to touch other cryptocurrencies. This statement is harsh but extremely true; the entire industry has been forced to provide this answer in one bull market after another. So looking back, doesn't the past decade feel like a large-scale experiment? Countless people have ventured into entrepreneurship, building, financing, and trial and error, only to continuously help the market confirm one thing: Bitcoin is the only existence that does not need to be proven. This is not a denial of other altcoins, but rather a reflection of the operational mechanism of this industry, which inherently rewards holding a belief in consensus rather than creating value. You can create protocols, applications, and narratives, but as long as they cannot form a true native demand, they will ultimately lead to one outcome: being priced by the market, being cashed out, and then flowing back into BTC. This structure neither creates new value nor attracts new users; in extreme PVP scenarios, it can only lead to a greater collapse of trust. When someone who has personally created a top ten cryptocurrency by market cap says to only buy BTC and not to start a business, this is not a problem with the industry, but a rational conclusion after seeing the structure clearly. If the early crypto world was an adventure about possibilities, today it feels more like a selection about belonging. You could say that over the past decade, everyone in this industry, every chain, and every product has perhaps ultimately been doing one thing: using their own practices to continuously cash out and push Bitcoin up. If BTC is the engine, then the altcoins are what drive this engine forward.