What are the considerations that should guide the decision-making of small investors?
a) "believers": Hold. Nautilus Minerals will succeed in getting to SOP within an acceptable timeframe (</= 2.5 years), and small investors stand to benefit from that, too. After all, the company has made visible progress in recent months. Dilution may happen again, but will be (temporarily?) offset by the massive media hype and a corresponding, excessive(?) rise in the share price once the company proves its concept works.
b) "doubters" with a large investment: Sell. Past events are a guidance as to what the future has in store. Opportunity costs are unaceptably high: Other PM mining companies will do well if the POG continues to rise; the price of large oil drilling companies has dropped to historic lows etc. Another round of dilution or a buyout on unfavourable terms for small investors is unavoidable. As the company stumbles closer to SOP, all sorts of technical issues, news about mysterious mishaps, fraud etc. will likely emerge, causing fresh frustrations and delays. Hold until stock price has risen to acceptable levels, and sell everythin as fast as possible.
c) "doubters" with a small investment and a shred of hope left: Hold (part of the investment) but write the money off as a loss, for the sake of mental sanity.
d) "speculators": No matter whether the enterprise as a whole or small shareholders are fundamentally doomed or not in the "longer" term, the price will rise (and fall) again before the party is over. Good news along the way will trigger price hikes, which can be taken advantage of in the short run (to reduce previous losses)
Nautilus might be an interesting stock for cynical speculators who are emotionally detached, agile, and prepare to buy a large number of shares one day and sell them the next. Personally, I am oscillating between b) and c). I have to admit that my friends who warned me that this share was highly speculative were dead right. Yesterday's events have shown that being patient and long is no guarantee that one stands to profit from progress made on the technical/assembly front.