You will be asked these within a week of mentioning bitcoin. Here are the short answers; the Bitcoin FUD, answered course has the long ones.
Is it anonymous?
No. It is pseudonymous. Addresses are not names, but every transaction is public forever, and buying through a regulated exchange ties your identity to your coins. Privacy is possible but takes effort.
Is it used by criminals?
Far less than cash. Chain analysis firms estimate illicit activity at well under 1% of bitcoin volume; the UN puts fiat money laundering at 2 to 5% of global GDP. A permanent public ledger is a poor tool for crime, which is why prosecutors like it.
Is it a Ponzi scheme?
A Ponzi pays old investors with new investors' money, promises returns, has a central operator and hides its books. Bitcoin promises nothing, has no operator, and its ledger and code are fully open. It has survived four bear markets of over 70% without new buyers to pay anyone.
Can it be hacked?
The network has never been hacked in seventeen years. Exchanges and individuals get hacked constantly, which is a lesson about custody, not about Bitcoin. Rewriting the chain would require out-computing the entire global network.
Is it too late?
Under 5% of the world's population owns any bitcoin. Most institutions, pension funds and countries own none. "Too late" has been said at $1, $100, $1,000 and $10,000. Nobody knows the future price; what we know is how early adoption still is.