What effects, both positive and negative, does the fact that a substantial proportion of people that invest or get involved with Bitcoin in the first place, have the intention of making profit in a fiat currency as their primary objective? There are many people who do not fall within this category and many, who start in this manner, that then take on other ideals and ambitions. There are also many who want to "cash in, cash out".
To be honest with you, I do not really care what Bitcoin users use their Bitcoin for, and it does not affect the network negatively, what matters more in my opinion is the influx of people, and even institutional investors into the network, what they use their funds for is entirely their business. Making profits is great, as a matter of fact, who wants to incur loss? It's a simple answer no, Bitcoin is used as a hedge by a lot of people, as a currency by others, for investment by more people, etc, I'll not worry about all that if I were you, as long as you believe in the network, you use it the way you choose, just make sure your funds are secured tightly, that's more important if you ask me.