Is $5 a good tip in Mexico?

Could you please elaborate on whether $5 is considered an appropriate tip in Mexico? I'm trying to understand the local tipping culture and whether this amount would be regarded as sufficient or generous. Would it be suitable for restaurants, taxis, or other services? Is there a general rule or does it depend on the type of establishment or service? Also, is it customary to tip in cash or are there other options such as electronic tipping? Thank you for your insights.