Can you hack a blockchain? No..
Anything humans made on this planet as far as software goes is 100% hackable.. This blockchain tech is 100% sentient.. It will hack you back if you try to hack.. Try it.. See what happens.. But I already know you have double digit i.q so I am not expecting an intelligent reply from you or most of the users on this forum.
Isn't this a good thing about Bitcoin? This makes us safe from regular thefts, or hacking of coins online, compared to PayPal accounts or even physical gold. In a way it provides security, or do you mean that we all might fall into this Bitcoin scam? Possible, but since it is decentralized and has no one controlling it, it is less likely for Bitcoin to turn to nothing overnight.
I know it is weird how a digital thing can be worth much more than gold, a scarce metal on this world, and perhaps this is a trend to buy Bitcoin. Why do we buy Bitcoin? Same reason, it is
limited... as for its uses, it has potential on what blockchain can become, which you can think of too.
