Rising and falling bitcoin, volatility, etc.
A lot can be done with just a bitcoin rolling in the right direction, see the reference.
Extra credit for top 5-10 altcoins:
OK, here we go: https://photos.icons8.com/category--cryptocurrencies-5a8ad54cf0fed7002a517949
More to come next week, with other people holding various coins.
If you need anything more specific, please open another request.