When I first got to know bitcoin, I thought it was the same as the payment system that was trending in 2011 namely Paypal, initially using bitcoin was confused because I made a wallet on blockchain.info without email registration, only relied on many characters so when I deposited 0.475 btc I lost bitcoin which I collected from giveaways and faucets.
it is actually designed as a form of payment, a digital currency alternative to fiat but unfortunately, people took this as an opportunity to make a profit in a form of investment. Well, that sounds still okay coz even the majority consider this as a form of investment, some still using it as a currency which in fact, I'd use this sometimes. But if Bitcoin is become accepted and legally adopted globally, that will encourage people to use it as currency, not just for investment purposes.