Indeed, holding Bitcoin is relatively safe if only we are patient, as the value of this currency remains high in the long run despite considerable changing in the short term. However, its price is high but with strategies such as dollar cost averaging, we can invest little amount at one time. But in principle, altcoins also have their plus and can help the owner to earn money, and if we take the best projects on the CMC site, then they will make a profit.
Until now, what is able to provide a sense of security is, of course, bitcoin. It just requires a lot of money and requires great patience, because bitcoin is a long-term investment. At least after the halving period there will be a surprise and the period is 4 years, although for the short term, sometimes it can be done with good analysis so as not to be wrong in determining the selling price.
Actually, when it comes to profits, altcoins are no less profitable than investing in bitcoin, but altcoins always have a greater risk than bitcoin and the price can drop drastically or even disappear from the exchange, besides the potential coin that we invest in.