if Bitcoin increases I can get big profits and lots of dollars. More bitcoin more dollars. Maybe the bitcoin situation isn't that good but I still believe and will continue to support bitcoin no matter what.
I think I stick to the rule that it's not good to keep all eggs in one basket, so I always try to diversify my investment. And other Bitcoin and cryptocurrency are still unstable and quite acceptable to fully depend on them so that some reserves in fiat, dollars or something else are needed.
I prefer Bitcoin but also have something in fiat, in my case it's not dollars but Euros.