There are several reasons why we should hold Bitcoin only, Bitcoin is very trusted amd reliable I know that this has been said countless times yea, but we won't stop saying it, Bitcoin is one of a kind when it comes to the world of digital asset, though the percentage of bitcoin in terms of profit is sufficient in a short term holding, that's why it is advisable for everyone to tightly hold for a longer term, bitcoin has considered the world of coin and place itself high above any fiat currency and digital currency respectively, we can go on and on to virtualize the benefit of holding Bitcoin, i wont doubt the fact that people had benefited in altcoin too but Bitcoin remains the major coin to hold.
Bitcoin will remain number one, because someone who invests in crypto without holding bitcoin is a big mistake and needs to question their investment objectives because bitcoin is a future asset that we must have in our portfolio.
Many of Atltcoin are scams and failures. However, there are several altcoins that have a future, such as ETH and BNB, which to date have never disappointed their holders. In my opinion, before buying altcoins, try to update reliable news so you can find out the advantages and disadvantages of each coin which continues to increase. Beginners usually buy altcoins that have a very large market capitalization so they can be held for a long period of time and don't have to worry about the ups and downs of an asset's price.
I myself invest in Bitcoin and Altcoins. Of course, I definitely allocate the largest amount of funds to Bitcoin because Bitcoin is like savings for the future.
The altcoins that I currently hold are ETH, BNB and Matic. Hopefully the bitcoins and altcoins that I invest in can produce results in the future so that financial freedom can be created.