I'd stick 90%+ into bitcoin and then toy around with a couple alts. I'd stick a large majority of the remaining into polygon/matic. The coin shoukd be primed for a nice move in price once the bull run is in full affect. But don't get it wrong most of it should get put into bitcoin.
If I were to decide and advise OP ? i would choose like what you said to pur that 90%
instead in altcoin? that would be bitcoin because I have seen this kind of scenario many times that before anything else bitcoin
is the safest and the highest increasing currency in all bullrun.
What altcoin / altcoins would you choose and what would you invest your million in?
Because the only coins that have successfully faced bearish and bullish are currently BTC and ETH.
In some bullish and bearish periods.
The coin can return to its original price, even exceeding the previous price.
If other coins go up, they can go really high, but once they're stuck for years they might not be picked up.
or maybe because majority of people here in bitcointalk are Bitcoin holder so blame no one but OP for asking this here .