I entered the bitcoin as introduced my friend. At that time my friend told me with bitcoin I can get the money, and I was invited to look at this and some of the bitcoin wallet. I told exploring this forum itself, at first I only know faucet but over time I recognize the signature campaign and trade.
That's how it happens to us all, no ? I was actually introduced to this forum from my brother ( he is 3 years elder than me ) who said bitcoins are awesome and you should try using the forum because later the price will increase( well, yes he guessed that price would increase ) and hence I joined though I could not buy much BTC back then.
I think majority of us haves started using bitcoins only because of our friends and I think we should be thankful them for that for introducing us to such an innovative and amazing currency.