- Instead of exporting your seed from blockchain and import it into electrum, it's better to create a brand new electrum wallet, then move all funds from blockchain to electrum. The seed generated by blockchain might be compromised (or at least, it has bigger odds of being compromised compared to a clean seed generated freshly on a clean pc running a verified version of electrum)
- Coinomi seems secure right now, but it has had some serious security vulnerability's in the past, and i didn't like the way they handled these (other wallets have had vulnerability's aswell, but imho, they handled these issues more gracefully)
- If you stay away from online wallets and stick to desktop, paper or hardware wallets, your country is not important. As soon as you start using an online platform, they are the ones in controll of your funds, so they can block you or kick you out for any reason (including, but not limited to, your country of residence)
- It does not take 4 hours to move funds. Transactions are allmost instant, confirmations can take a while (on AVERAGE, one block is found every ~10 minutes, however, depending on, for example, your feerate it might be possible your tx doesn't end up in the next block). The problem here is that you use an online platform, so this platform can chose whatever timeframe they want to process your withdrawal. If they chose to wait 4 hours before creating the withdrawal transaction, you'll have to wait 4+ hours to get your withdrawal transaction confirmed. This has nothing to do with the bitcoin protocol, and everything to do with the policies of the web wallet provider you picked
- Electrum is fine as a mobile and desktop wallet (CHECK the signature, if ThomasV didn't sign, don't run the binary). IF you decide to invest more than a couple hundred bucks in crypto currencies, don't cheap out and buy a ledger or a trezor hardware wallet... If you're a cheapass, at least use a PROPERLY generated (bip38 encrypted) paper wallet to store bigger amounts, or use an old laptop/pc as airgapped wallet. Keeping a lot of funds on a web wallet, mobile wallet or even a desktop wallet is asking for troubles in the longrun