There's a lot of reason why people chooses/attracts to Bitcoin rather the other cyptocurrency, I will list down all the reasons I know why people chooses Bitcoin rather the Altcoins this is all according to my own opinions, perspective and experience.

1. The stability of Bitcoin.
2. You can easily Earn it through working here in the forum or to other freelance works.
3. Can be used as a mode of payment.
4. The price is High.
5. Most know cryptocurrency in the market and in the industry.
6. The fast change of the value because of volume in exchanges.
7. Most  online stores, shops recognize it as a mode of payment.
8. Can be used as Investment.
9. Can be used as Savings.
10. Can be use in gambling.
11. Form of transaction.

There's many reason why Bitcoin attracts a lot of people rather than the altcoin, but we have different reasons why we choose bitcoin rather than altcoins for me the reason why I choose bitcoin rather than altcoins is because of It's stability even though I will leave it for a year I know in myself that the price of it will not crash instead It's price will increase.