The strongest case for a small first deposit has nothing to do with the markets themselves. You are testing a process — sign-up, verification, funding, a first position and, most importantly, a withdrawal — and that test should cost as little as possible.
Run the full loop at the minimum deposit of ₱15,000. Deposit, wait, withdraw part of it, and see how long the money takes to return and whether it goes back to your original method. A platform that handles a small withdrawal cleanly is one worth scaling into.
Only after that round trip does it make sense to think about size, and even then in steps rather than one big move. A bigger deposit does not make a strategy work better; it only makes the same outcome larger in both directions.
Why the first deposit matters most
The first deposit sets the habit. An amount chosen because it feels comfortable tends to lead to calm decisions later; an amount chosen because it felt like the maximum possible tends to lead to decisions made under pressure.
A workable starting point
Money you would not need back within a year, in an amount whose loss would be annoying rather than damaging. That number is personal, and nobody else can set it for you.
Adding to it later
Topping up a balance you already understand beats starting large and learning the hard way afterwards.
Questions worth asking before you send anything
How do I withdraw, and to where? What gets deducted, and by whom? Who do I contact if something looks wrong? A platform that answers all three clearly, in writing, is behaving the way it should.
Investing involves risk, including the possible loss of some or all of the capital you invest. Values can rise or fall, and you may get back less than you put in. Never invest money you cannot afford to lose.