Ethereum has tested the waters by standing its ground near $ 300 during the last couple of days fall. This has a lot to tell about its inherent value both in terms of the technology its brings to the table and also the intrinsic value the investors & traders perceive.
The above statement is a testimony to the fundamental validity & future of the Ethereum, which has withstood the selling pressure because of the bearish sentiment of the market, the previous frenzied price increase correction, the ICO demand leading to the clogging of the network & delays in transfer etc.
Inspite of all this along with the Bitcoin loyalist pushing the price of Bitcoin & breaking the previous price co-relation between BTC & ETH - yet it stood the waters.
Fundamentally this says a lot about the inherent future of this token & technology.
If we take the Astrological angle, then the stars or constellations under whose influence Ethereum was born (pre-ICO launch day & time), have yet a long long way to go. According to my analysis before the end of August 2017, ETH will break the $ 500 barrier & by the end of 2017 it will cross $ 1000 mark. This does not mean there will not be few down movements but the ultimate price mentioned has a very high probability of materialising.
My advise is that there will not be many more opportunities in the near term to add this cryptocurrency below the $ 330 mark, if you believe in its future. But yes please do your own ground work before making a final decision.
All the best...