Quite safe actually. I mean you can protect yourself and your privacy with mixer and other staff but as someone know you have a wallet full of BTC and he knows who you are there you have a problem pal. You'll never know his intention and you know what they say: never trust anyone poor.
So in the end you can protect your seed or passfrase or private keys, but if someone hurt you or someone you know with blackmail also, you not have many options left.
Protect yourself with privacy coin also.
I've never heard that saying before, "Never trust anyone poor." That's a little wealth-ist. I personally wouldn't trust anyone at all with my money. That's why I keep my money in a place that no one else knows. You can have a friend that's richer than you, but upon discovering that you have a lot of money, he's going to start blackmailing you. It really is hard to know which of your friend is loyal and which one will betray you. Sometimes it's the poor that's loyal and it's the rich that isn't. So don't judge people just because of their financial state.
I do not think bitcoin is safe, except for hackers. Many hackers now have the crypto attacked. not only bitcoin their attack but also different coins and even tokens.
AFAIK, the hacks happening in the altcoin world is due to the person's negligence such as uploading their private key in some website, mistakingly copy+pasting their private key to a form, or simply saving a file of their passwords somewhere that turned out to be unsafe. It's not a hacker who did the "hack". It's the people's fault and no one else. They just call it a "hack" even when it's not cuz "I got hacked" is way more cooler than "I sent my private key to someone in the web."
Bitcoin is the safest cryptocurrency because bitcoin transaction is encrypted and secure bitcoin never compromised its security but many exchanges and wallets compromised and hackers steal our cryptocurrencies. in my opinion Hardware wallet is the safest way to secure our bitcoin because this is not connected with internet and we can access our funds via private keys, we need to print private keys on a paper and keep it in secure place and if we are doing trading than only put that fund in exchanges which we wanna trade.
It is not 'constantly' connected to the Internet is what you should say. At some point you're going to need to connect it to the Internet because that's what you need in order to send funds to another address. People go crazy over hardware wallets. Trezor devices are so expensive and people really do set aside some money to buy one but I don't see it more secure than paper wallet or a pendrive wallet. It might even be more dangerous because what would happen if someone found an exploit to all Trezor devices.