Are cheap Bluetooth speakers like Anker or Ortizan worth it?

For casual use, yes. Verified-purchase reviewers at Best Buy rate the Ortizan highly for sound, battery and waterproofing at its price. High-trust testers are more critical of the budget tier overall, with rtings.com and techgearlab.com noting the Anker Soundcore 2 lacks loudness and bass depth, so set expectations accordingly.