Hi, have you ever thought this?
You know that, to import a wallet you need the private key or your seed. Taking as example the private key (the 52 letters key). It could exist the possibility someone create a software whose function was to try thousands of times to find the private key till it is be done.This would be like the process to find the new block in mining, anyway you can try the times you want in order to find it.
I think this could be a weakness, correct me if I am wrong.

Or comment if you have a kind of solution for this...
Regards!
Hackers nowadays are getting better and better and if you are not going to be careful with your storing of bitcoin, you can potentially loose everything you have right now. I would recommend that you find a good wallet and make sure that it is proven and tested to be worth your trust, afterwards, make sure it is fully secured so that you won't end up getting hacked.