Why not both? While Bitcoin was initially envisioned as a pure currency with some basic scripting features, the advent of the Initial Coin Offering (ICO) transformed cryptocurrency into an easy way to bootstrap speculative research projects in distributed compute, while simultaneously enabling new forms of scams.
So the speculation is part and parcel to making the network something worth using! We use portfolios to describe collections of wallets because it's difficult to tell whether Ethereum or Cardano is going to be the winner-take-all shared VM in 20 years. If you want your compute cycles to hold value, you better choose the right one.
Our philosophy is to choose the One Key Performance Indicator (KPI) for each cryptocurrency, and then allocate into each currency based on the relative performance of currencies that share that KPI.
For example, as a social network investor in 2004, it maybe wasn't obvious whether you should invest in Facebook, Myspace, or Friendster. But if you got a daily active user report every 10 minutes (like you do with Bitcoin), then maybe you could have moved your funds into Facebook as the users skyrocketed.
So that's why we talk about portfolios, and see them as an important part of being a cryptocurrency user.