Should I solo mine Kaspa or join a mining pool?

It depends on how much hashing power you control relative to the entire Kaspa network. Solo mining is generally more profitable because pools take a percentage of the block reward for their services — and can occasionally engage in deceitful practices. However, finding a block in Kaspa (or any proof-of-work coin) requires solving a cryptographic puzzle, and that process is inherently random. A miner with a small share of the network's total hashrate could go a very long time without ever solving one. For most home miners, a pool trades a slightly smaller payout for a steady, predictable income stream — which makes budgeting and hardware ROI far easier to reason about.