Almost anyone should be able to figure out whether they have an extra $10 or not. If they cannot figure it out, then they have to figure it out...so once they figure out that they have an extra $10 they can get started, and they can sort out the other aspects of their potentially messy finances and/or psychology as they go. Position size can do a lot in terms of both starting out and also not overdoing it so that there are abilities to figure out an appropriate level of aggressiveness. I would thing that most people are going to start out investing into bitcoin in a non-aggressive way and work their way up towards being more aggressive, unless they happen to already have a pretty good grasp on their finances and they can understand and appreciate the strength of bitcoin's investment thesis from the start.
$10 constant investment will amount to little in the long run and almost a messy way to start up a bitcoin investment, I think also that for anyone to arrive at a successful investment position one needs to be aggressive a bit, at least that will help us to be able to take some aggressive financial decisions that can help us to arrive at a good investment position faster.
Investing a low amount like $10 as mentioned by members sounds like a joke considering Bitcoin's current value.
Surely, I am making a point about getting started and also about being reasonable. When a person is getting started he will likely not know very much, so he has to pick a starting entry level amount, and surely $10 does not seem like much, but it can still be used to suggest that almost any random person who we might pick off of the street should be able to figure out on the fly whether they have an extra $10 to get started. Sure for some people they have a lot more money at their disposal, yet a certain number of guys still have some troubles with even getting started with putting $10 per week into bitcoin.
Some beginners do not have any idea on Bitcoin investment or any strategy they can use to accumulate Bitcoin in to their portfolio during the month but they still choose to get started cause they believe that the earlier they start investing on Bitcoin the earlier they also get knowledge about Bitcoin and the kind of strategy they could use to keep on accumulating more Bitcoin. However at first they may think to invest little amount but as time goes and they begin to understand the process of Bitcoin investment, they might decide to increase the amount they are investing on Bitcoin (many from $10 to $50 weekly). Weekly Bitcoin investment is kind of better than monthly investment but it depends if the investor is getting money every week.