Do you cash or chips or keep them

I have been playing with the share market the last few weeks with about 70K & about 3.5K bundles.

in the last 2 weeks alone i have made approx $15K My question is one that confuses me a little.

Do i sell them to cash in the money and then look for another opportunity???

My financial advisor gave me 3 shares to play with (i have not brought one yet) as when i reviewed the stock market the shares seemed to be a little over priced to what they have been. (3 shares COM, TLS & AGL).

I have purchased shares that are not on my advisors recommended list that may or may not be good long term Companies:

*Seven
Reasons: its one of the better stations they seem to be innovative

*QBE
Reasons: Every one needs insurance

*Myer
Reason: it looked cheap at the time

*Mount Gibson Iron Ore
Reason: I don't know why as i have held shares in this company for a number of years and lost alot of money but it seemed cheap & cash flow has been ok.

*Metcash
Reason: discounted & future cash flow opportunities

*JBHIFI
Reason: I have been told to own companies that inspire you & that you can monitor each day

*Energy Resources Australia
Reason: i needed some diversification and this was my substitute to AGL

*David jones
Reason: sentimental (i know a bad reason) but they have a restructure plan & is the worlds oldest department store.

*Crown
Reason: Sydney development caught my eye.

*Billabong
Reason: brought cheap there is a offer on the tabel to sell at a higher price company very wobbly atm but they have a plan

*Ansell
Reason: recession proof we are always going to have sex & the health industry needs gloves.

*Nab:
Reasons: always given me good dividends so brought more.

I also have buy orders in for Quants, thorn & Orica ( for when the market reaches my price).

So i am abit confused do i cash out (i think this is called short investing & is sometimes not a good thing by what i read). My concerns are; The market crashes again & i loose some or all of my buffer that i have gained the last couple of weeks.

If i do cash out now i will have the extra $15k to buy more of the recommended shares if the price comes down.

I am a long term investor i am in my 20's & don't need to cash out anything till i am much older so i was hopping to have shares of companies that will stick around that can compound.

One confused Jeffery