Well, I hope Bitcointalk doesn't disappoint me and give the OP a few merits for saying he wants to accumulate a Bitcoin.
Imagine I'm aiming to accumulate 1 BTC, and all I have is $30 to start with.
Let's assume you can save $30 a week, which is going to take a long time to accumulate 1 Bitcoin. If it was $30 a month it would be even worse. Using
https://dcabtc.com/ we see that if you get to start about 6 and a half years ago or so today you would have 1 Bitcoin. But the price in the future will go up and it will cost much more to accumulate, so it will take you at the very least twice as long to accumulate 1 Bitcoin. Think that 6 years ago the price was 10 times lower.
The good thing is not to get obsessed with round figures. If you start now and instead of accumulating a whole Bitcoin, let's say that in 5 years you have accumulated 0.1 Bitcoin instead of a whole 1 Bitcoin, the purchasing power of that amount will be considerable.