I have purchased Neo when it was called antshares at $ 2 as well :)
I don't believe in purchasing aggressively rather average out your purchases in such volatile market. There are multiple dimensions for prices going up and down that include demand, supply, hype, rumors, corporate players, market regulators, bots, etc. but the biggest factor that makes the difference is fundamental of that crypto currency i.e. what they are doing and how different they are from rest of the cryptos.
My wishlist at this time in the market (when it is having a down trend) is to purchase and average out

• Neo at $ 20 and below
• Qtum at $ 10 and below
• Stratis below $ 5
• Nexus at $ 2.5 and below
• Purchase BTC around $ 3200 and below

Based on my previous experiences, getting such good prices is not something you will see frequently; specially when the crypto space has inflated over $ 150 Billion (1024% growth from last year).

At this time in market the mantra to make profit is:
Buy today and forget, rest ensure you will make profit in coming months.