Bitcoin is known as the king(father) of crypto currencies , but why is that so ?I have been for several months now reading a lot about the whole crypto ecosystem, i even bought several bitcoins.
Enough background, now on to the topic at hand.

1. Low Fees - Nowadays the average fee for BTC is under $0.5 that was a very good sign for adoption of Bitcoin on large scale. In late 2017 Bitcoin fee was very high around $15 and that time the model of Satoshi Nakamoto  is seems to be failed to transfer across the world with almost no fee but the fee is very small and one can easily make a transfer of $5 anywhere in the world.

2 Store of value - It's still a lot. Physical gold has survived wars and governments. Now we have it's virtual version(Bitcoin) that can't be falsified and is easy to carry and trade. Isn't it great?
Bitcoin is functioning as a payment system in Korea and Japan. I could even order food with it or pay the dentist nearby. It's fun to be using something nobody else does, it's a great talk at parties and a great speculative asset, just ask all those traders who made it their full-time job.

3. Lightning Network - LN is making Bitcoin more valuable. Small stores and companies accepting bitcoin using LN that was perfect for small transactions.