What is wrong with IOTA? I have bought some some days ago and I wrote down my seed....
Should I do something with ?
If you were not using the newest client 2.4.0 when you created your seed, you should upgrade to 2.4.0 and create a brand new seed with 2.4.0 and transafer your coins to the new seed. It is mandatory to do so. The new GUI client can help you to do this transition. The step by step guide is here -
https://matthewwinstonjohnson.gitbooks.io/iota-guide-and-faq/getting-started/guide-transition.htmlIf you used android wallet before, you have to do this transition on the GUI desktop wallet. To my best knowledge, you can't do the transition on the Android wallet.