What to buy

Just like the title says I have enough to buy exactly one Bitcoin or spread that money into alts at these prices what would you guys do. Btc is near its ath and I just can’t buy at the top like this. What about near, sui, Solana, ext. What about spreading 70k into alts do you think that’s dangerous or a better option. I was a little worried when I saw btc run and none of the other coins were really going up when they used to. And another thing is I don’t know where we are at in the cycle. People say alts do t survive 4 year cycles. I just don’t know and I’m not fomoing into btc at 68 grand. Any thoughts would be appreciated thanks.