It is never right to invest in crypto currency. What you are thinking is that after you have enough Bitcoin in your portfolio, you can invest in crypto currency. But it is not right to do so. Crypto currency is very risky, so the risk of losing your money is very high. Invest in Bitcoin with the amount of money you want to invest in crypto currency. I think if you invest in Bitcoin and hold it for a long time, you can make a lot of profit. Never step into crypto currency and it is not good to advise anyone else to step into crypto currency.
You also start giving such a convoluted understanding that it can be a little difficult for beginners who want to invest in Bitcoin to understand. You don't have to use the word cryptocurrency to give people an understanding if you don't recommend other coins besides Bitcoin for long-term investment. You just need to say that only Bitcoin is good enough for long-term investment, while others can be used for a moment for short-term profit before being completely dumped back into the market. So you don't need to use the word "cryptocurrency" anymore to simplify the understanding in this one discussion.
Seems you don't understand the word (crypto currency) now let me make it clear for you, crypto currency is a digital currency that allows people to make payments directly to each other through an online system by using both bitcoin and any coin that is available in the crypto market, you saying that (we should never step into crypto currency) that means you're indirectly telling us that we shouldn't invest in bitcoin because bitcoin is also part of the crypto currency which you're talking about here, this is why you need to be sure of what you're saying before giving any suggestions because this your advice is very confusing.
I also felt a little confused by what he said so I read it over and over again to understand what he was saying, even though what he wanted to say was not to put money in coins other than Bitcoin or in other words altcoin or shitcoin. But because he used a word that is very common to understand, it will actually confuse many people when they read it even though on the one hand he also suggests choosing Bitcoin as a better investment, but because the way he conveyed it was a little off, it has actually created confusion for other people here.