As a matter of fact, it's very unsafe to depend on a single coin. In otherwords, invest into more than one token by spreading your investment into potential coins but be careful not to invest into pump and dump coins. Above all, make sure to maintain risk management in which ever crypto asset you are investing in.
You're confusing yourself, I hope you know tokens and coins aren't the same thing. Bitcoin is a coin (not a token). Investing in multiple tokens isn't the best decision you should be making when you want to invest as tokens are usually worthless at the end of the day and having multiple of them increase your losses. As a newbie investing in the industry for the first time your attention should all be on Bitcoin ignore other distractions as you would regret in future when they all go crashing down because of some few corrections experience by Bitcoin. The only tip on investment that's valid is to accumulate Bitcoin.
It's unsafe to depend on altcoins and depending on multiple altcoins only increase the weight of the losses you'll experienced when the market has other plans contrary to what you have planned. Joining a community is recommended and this forum right here is a perfect example of a community to join because you'll be getting the best advises here. Obviously you won't have to listen to everything that's said in a community because it's a mixture of both truth and lies.