While I don't see myself becoming a whale any time soon, I'm sharing the same sentiment and stacking up my SPS. I'm not sure what exactly to expect once the presale is done with vouchers. Could be a mistake on my end but I've been selling them after buying my 1 Chaos Legion pack. We'll see how it plays out with vouchers, but I'm closing in to 1k SPS staked and continuing to grow.
I've also sold all my vouchers so far. I think that it will be getting cheaper to buy packs later on.