I agree with you. I also feel that investing in bitcoin is safer than investing in other coins. as a layman, I feel that bitcoin is a popular coin and is the king of coins, so there is no doubt on bitcoin, even though we also have to remain cautious in investing in bitcoin, because in all jobs certainly have risks to be faced.
I don't know how can you say that investing on Bitcoin is safer than other coins since they are all the same.
Bitcoin and other crpytocurrencies are the same since they are all investments and a volatile investment at that. I don't see the difference of Bitcoin to other cryptocurrencies, the only thing that Bitcoin has an advantage of is that it is the first one. Investments are the same since there are these risks on investing on them, there is no sure profit on investments the reason they are investment.