Question A:
I already spent my first crypto to buy some other crypto. Yea, I believe in this stuff! Once it moons and you can afford that Lambo, go buy something practical. Perhaps something that will provide a steady cash flow. Forget about that Lambo, it's just a money-pit.

Question B:
I'm terrible with names and hardly know anyone in the crypto-world. The only name I know is Vitalik of Etherium fame. I watched an interview of Vitalik's father and either he's a great PR man or just a really nice guy. He convinced me that Vitalik has honorable intentions and is truly working to make the world a better place. Who wouldn't want to support such a noble cause? I bought some ETH.

Question C:
I think the crypto-world will look much like it does now in another 5 years. People will still be looking for that magic coin that will 1,000X their investment. They will still play the market and someone will always be trying to scam you out of your money.

I expect that we will have better user interfaces to make dealing with crypto much easier than it is now. Wallets that consolidate the various coins and take the hassle out of managing all the various coins will be most popular. More merchants will begin accepting crypto directly, but it will not be mainstream yet. There are too many coins and making wallets/payment gateways for each one is far too cumbersome. An automated exchange may be required so that customers can pay with their chosen currency/coin and the merchant will receive just the one coin they prefer.

I suspect that while some new coins will appear, a large number of coins will disappear as the strongest coins make the others irrelevant.

Bitcoin might still be the dominant coin, but the lead it has will shrink as other coins gain media attention. The public will become aware of the fact that there are other crypto-currencies besides Bitcoin.