If he still holds 250 ETHs, I think he will wait a little longer and he can go a different way for him then when he goes above $ 1,000. Maybe he keeps a little bit more or he might want to use it.
Well, 250 ETH is a great amount and that would be a wiser thought to presently hold this currency. ETH is still a developing currency and I believe it would, even more, higher in the upcoming months and by selling it here will definitely cause you to regret in future. So it would better option to hold the currency for now and wait for a good time to sell or trade as more the time you'll invest in holding the currency higher will be the gains you'll get out of it...
Ethereum can reach $3,500 price within 1 year. Thus selling it is not right at the moment. If you do this, you would have a great regret after it for sure. Ethereum can surpass bitcoin's position and become the number one of the sector.