256 is the most recent swing high, not quite 50% fib retracement, though logical to see some sellers. Depending where you bought, you can consider selling partial at 250 (1/4 of your holdings for example) and keep the rest for a possible move higher. At 61.8% retracement, we are looking at 300 area, which is a nice round number and potentially even more sellers. ETH seems to be recuperating, but if you see a sharp sell-off at 250 and close below 200 on the daily, that means it is lose steam and may retest 160 area again. Have a game plan and good luck!