1 coin per block or 10 coins?

I am creating a new cryptocurrency and I would like to ask a recommendation of the amount of coins to be mined per block.
Originally I was thinking to mine 10 coins per block every 15 seconds. This would give me 20 million coins per block in a year. It looks like this would be too much for a new , unknown currency, so it would not appreciate quickly. But if I set the reward per block to 1 coin (2 million coins per year), this would not be very appealing for miners to mine it. Considering that the currency was not yet emitted in sufficient amount, it would be a problem to acquire it in large quantities for investors.

So my question is, based on your experience, is the scarcity of a cryptocurrency a big problem ?

p.s.
exponential difficulty increase in time is not planned for this currency, linear (constant) difficulty is the choice