For Bitcoin; it's never too late 
There was a time when we used to say that anything under 50k is a good buying zone , these days anything under 100k is another great buying opportunity. See the macro picture for Bitcoin and we know that's it's still early days in bitcoin.
And as time goes on, the buying limit to be considered cheap will be increasing, even as we have seen Bitcoin reach $100k plus, which makes any purchase below $100k to be cheap. There are still those who consider even buying Bitcoin above $100k as cheap based on what it's believed the price will be in the nearest future. Now is considered to be the best and right time to buy as many as possible before we move into the next circle.There was a time when we used to say that anything under 50k is a good buying zone , these days anything under 100k is another great buying opportunity. See the macro picture for Bitcoin and we know that's it's still early days in bitcoin.