can they hack into our wallet. There are many professional hackers out there. What are the chances? Also what is the safest way to safeguard ourself?
Yes, why not? Nothing online is 100% secure or unhackable - All i takes is a good hacker to hack in to it. that is why it is always advisable to store your bitcoin in an offline wallet which completely off the grid. thus, no one can access it but you, the owner.
There are a lot of good hackers out there right now because anything can be learned now a days in this modern world. Bitcoin being a digital currency means it is within the internet which is accessible by a lot of people, you just need to pick a good kind of wallet but I agree with you having a cold storage or offline wallet because it is much secure that trusting it on third party software.