The SEC distinguishes Bitcoin from other cryptocurrencies and considers it to be a decentralized digital cash, exempting it from the classification of "security" that applies to many other tokens.
These are not the only few factors on which they have declared it not a security because other than BTC there are four or five more cryptocurrencies are declared as not Securities by them But as i said before BTC is the king so all eyes on me/BTC.
The SEC never made such claim. I know some people want to put bitcoin in a different category as other cryptocurrencies (rightfully so, because they're made for different purposes), but I doesn't change the fact that bitcoin is indeed a cryptocurrency.
OP has made mistake while writing the title as in the post he confirmed that SEC said that BTC is not a Security but in the title Op said BTC is not a crypto. I think OP didn't able to differentiate between these two terms. Well, And the OP is a little bit late too as this news was already shared here before like yesterday. So, Op is launching the rocket a little bit late.
BTC is a leading and the king Coin in Cryptocurrency and that's what many other members has emphasized for Dear OP.