but if you want to trade bitcoin, i think it's the right decision because bitcoin volume is very good, and more secure.
We don't need to focus on Bitcoin to be a successful trader because there are many cryptocurrency out there are good to trade but we can't deny that most of them are focusing on Bitcoin. Altcoins mostly rely on Bitcoins movement that's why it's difficult to trade with them, and also very volatile have long wicks. Unlike Bitcoin, it has low volatility and didn't rely on any currency.
all traders focus mainly on trading and investing in bitcoin, but if you choose altcoins as the main source of investment then that's the wrong choice, because altcoins are not guaranteed to increase even though bitcoin prices have increased, even though the top altcoins are still at risk and we have to learn from high losses due to top altcoin FTT and Luna worst crash last year.