You are never too late to make an investment on btc .Now it is the right time to invest on btc as the price is also low its better to buy in as much as btc possible when the market is low and sell them off when you find your investment at profit as it is normal tendency for every investor to sell off their investment when it is at profit.It is never too late to buy in btc as the are still btc coins left to get mined and it will take another 100 plus year to mine the last bitcoin.