ok I'm trying to work out how I can make some money from selling BTC at a high price and then buying in at lower (and then selling again at higher) but the exchanges are messing with my head! BTC price fluctuates £100s every minute but I can't find a way to buy in and sell and make any money.

For example on localbitcoins.com lets say 1 BTC is valued at £8500. If selling 1 BTC you can get £8550 (best price) and to buy 1 BTC is £8900 (at the same time). So there is £350 difference in buying/selling price and buy price is £400 above actual BTC value.

If 1 BTC then dropped to £8400, BTC buy rate would be £8800 (so more than what I sold for at £8500!). So I really then need to wait for BTC to drop to £8000 to make £100?

Thanks in advance (btc newbie)

1st September this year it looks like? Was this after the upgrade or not? Thanks

I have backed up my Blockchain.info wallet by creating the backup phrase. This didn’t include any display of private key.

I have been able to export the private key for my Etherum address, but not for Bitcoin address (it’s not available from settings  addresses (only edit name and show xpub is).

Question is – if I have my backup phrase, is this all that is needed should blockchain.info get hacked, or do I also need the private keys?

Thanks in advance.