Acting too impulsively or being overly cautious and never acting

[Priyanshu Adathakkar]

Two of the most common traits of budding real estate investors who never make it beyond their first property (or sometimes never even make it to their first!), are either acting too impulsively or being overly cautious and never acting at all. The first is being in too much of a hurry. They think they have to have it all yesterday. The second are procrastinators and their own worst enemy.

[Joe Villeneuve]

Actually, the reason for both is the same...lack of preparedness.  They don't know how to analyze properly, and are either unsure of any analysis they have done (and make no moves), or that poor analysis causes them to do something foolish.