Threats of Quantum Computing vs Reality

I do understand the threat of Quantum Computing, but do you guys really think that we would see a threat to SHA-256 and other encryptions? In our lifetime it’s pretty safe to say that there won’t be a classical computer sized Quantum Computer to use anonymously without being caught. Also, using the cloud and spending all that time to figure it out it would be extremely expensive once Quantum Computing is finally powerful enough to crack everything. Now, I’m no expert and will gladly take a downvote if this post seems idiotic, but, what do you guys think?