Yes, bitcoins is the primary crypto currency that i'm know and using. I have been using bitcoins for around 4 years.
Overall, i have much expectation about the progress of bitcoins and their development for the good of the world community.
I still loves and will using it for long time.
I do aware altcoins such as Ethereum, Waves and others some, i follow those news especially about dev improvement and community distribution link discussion. I hopes Bitcoins and altcoins dev can complete each other function for more better.