Yes it is. Bitcoin is by far the most successful cryptocurrency project, the success of which has not yet been repeated by anyone. I think that after halving it will become even more valuable and expensive.
Of course, there are other quite successful crypto projects, but still they are far from bitcoin. Probably the success of BTC in 2017 will not be surpassed anymore. but bitcoin will remain the dominant cryptocurrency.
I like Bitcoin because it is stable on a certain market cycle and you can use it using as stablecoin. I do not trust USDT, USDC and other obscure assets that are supposedly provided with real money. Altcoins are good in that their capitalization is low and they can be pumped well. By the way, many altcoins began to show good dynamics and the possibility of a trend reversal.
I agree with you that Bitcoin is the most reliable and secured privacy in the world. But I will not call Bitcoin a stable coin. This year BTC made almost x4.