Not planning to get rich could be a decent framework... yet we likely realize that we would like any of our invested earnings to have a competitive storage of value.. and to attempt to at least equal other places in which we could place such invested earnings.
Bitcoin is in no way a stable investment vehicle.. but with that lack of stability and risk comes the probability that it will appreciate in value much greater than other assets... accordingly, many of us, including myself, begin to think that it is possible to become rich (or at least richer than we already are) by taking a decent stake in bitcoin.
We could lose 100% of our investment; however, it is possible to 2x, 5x, 10x, 100x or even 1000x within 1- 10 years... ....
Anyhow, because of the risk of the investment, I placed as much money into it as I thought was feasible in the event that bitcoin were to go to zero; however, because I am taking a chance that it could exponentially increase in value, I remain fairly content when my investment into bitcoin at least retains the original value of the investment. Appreciation of value beyond the initial investment is icing on the cake... In other words, I am not counting on getting rich from bitcoin, but I have enough stake in the game that if it were to exponentially increase in value, I would do very well with such.. and I would consider myself to have become fairly rich with anywhere above 10x increase in value. Another question remains regarding whether BTC would be able to retain such a 10x increase in value, and some profits will likely need to be taken off the table at that point (and points along the way to prepare for the likelihood that there are going to be ups and downs in bitcoin's ongoing price performance).