How safe is Bitcoin really?

[n2004al]

Don't forget that everything can be hacked. Once it somebody created, there would be someone who would be able to hack it, I am sure. So it is like a bank, it would be stupid to put all your savements in one place and hope that it's 100% secure and nobody would touch it except you. I recommend you to use both offline and online wallets.

Am I considered as stupid even this one place hold my bitcoins offline and not online and if hacked, the hacker cannot find nothing or only few satoshi? Or even if this place will replace my bitcoins if those "were lost or stolen as a result of a breach of the physical security, cyber security, or as a result of employee theft" of the this place (which is an online wallet)?

I don't think so. If I store my bitcoins in this kind of place (even it is ONE place and not more than ONE) I consider myself very smart.

[anthonycamp]

use paper and pen wallet multibit you can get the sure that the wallet would be hacked if you dont post anywhere the codes

[Raimonn]

Bitcoin is secure, but it depends how do you use it. Online wallets could be compromised by hackers but normal problems with online wallets are unsecure passwords (or people that uses always the same password, and registered on unsecured web-ponzi). You can secure online wallets with any 2factors system, it will be more secure.
If you have large amounts of Bitcoins its better a cold storage: Trezor, Ledger or a paper wallet.

[StevenLiang]

Don't forget that everything can be hacked. Once it somebody created, there would be someone who would be able to hack it, I am sure. So it is like a bank, it would be stupid to put all your savements in one place and hope that it's 100% secure and nobody would touch it except you. I recommend you to use both offline and online wallets.

Split your BTC or altcoin on few wallet.
Both online and offline. Although online wallet more riskable from hacker but it's quite good to put small amount of our money into online than just using 1 offline wallet address.

[AtheistAKASaneBrain]

Transactions will never be able to stay unconfirmed forever. Every transaction goes through eventually, but have in mind that if you pay really low fees or not fees at all, it may take a lot of time. I once did an experiment and sent a 0 fee transaction, only to find out it took 6 days to confirm. It may be longer now. Dont recommend it at all.

[InvoKing]

How hard is it to hack an online wallet?
Can your transactions be stuck in limbo without confirmation?

For me bitcoin is +oo safer than paypal... They block your account for stupid reason but with online wallet anyone here got his wallet blocked?
Besides there is cold storage way safer..
For confirmation i don't think so, if you have your transaction unconfirmed then it will appear on your wallet after few days.

[crazyivan]

Since every single BTC users holds copy of BTC blockchain, I really do not see a way to change all these at the same time to fake some transaction.

So I would say, bulletproof safe.

[Nahl]

i'm very often using blockchain wallet to store my bitcoin and i think it's pretty safe to use it and i never had a problem from it

[fitraok09]

you can using offline wallet like bitcoin-core, electrum, etc and you can get full access to your wallet without worrying banned, server down, phising, or etc 

but you must caution against trojans like bitcoin stealer, because bitcoin stealer trojan will be able to know your bitcoin information that you have