I knew about bitcoin since March 2014
When i study cryptography at my college.
Then my lecturer give some homework to find linkages between cryptography and captcha
Then i google it
I found "bitcoin"
It interest me
Then i find more about it (how to earn and to use it)
And i realize that bitcoin worth as a hundred $$
It so shame one me
that bitcoin already begun since 2009
But i knew it at 2014
If i knew bitcoin faster, i probably will be a rich guy today